Man, that equipment would be a lifesaver for me!! I'm a Mobile Outboard Tech in Boston, MA and had a NIGHTMARE last season. 31' Contender with twin 300 HDPI's wasn't winterized (fuel system wasn't drained). Both motors needed VST cleaned, medium pressure fuel filters, medium pressure fuel pump, cleaned injectors and changed mystery filters. Motors still ran like crap, stalled out, idled poorly and no WOT. The owner assured me the fuel system on the boat was fine (fuel lines, water separators, tanks, pickup tubes ect.). Well after a couple thousand in motor work, I insisted we take a look at the boat fuel system. Well turns out the pickup screens were clogged and causing the fuel pressure to drop from 980PSI to 150PSI!! I use ALOT of your tips/tricks day to day, and I cannot thank you enough for taking the time to make these videos! Thanks AGAIN! #gasleak
Brilliant thank you, so informative yet so simple, I had a stroke 13 years ago, I was totally paralysed down the right hand side and blind in the right eye, To see me now you would never believe I ever had a stroke. but I have short term memory loss and I can't learn nothing new, I don't have a boat yet but I want a Honwave T32 IE with a 15hp outboard. I am saving as many good channels as I can to learn about my new hobby , after my stroke I was watching kids channels to teach me things because they put it over so simple I can take it in. Your channel is like that for me I understood it all, That I am more grateful than you can imagine. Thanks for sharing Ray K. UK. YNWA.
8months after buying an old boat, replacing the water/fuel separator the filter went bad. Reverted back to this video as to why the engine didnt have fuel and it saved the day. TY and keep @ it
Great video, never thought about using a clear hose to check for air leaks. Having a #gasleak sucks! You guys are the best for sharing all these tips and tricks! Thank you
We had a boat that would fall on its face just randomly, we changed a bunch of things trying to get rid of the problem , it turned out it was the internals of the brand new oem primer bulb. Love to watch y’all’s channel , picking up bits & pieces to help with the next adventure, thanks .
My last fuel problem stemed from the ethanol gas eating the inside of the fuel line and clogging it down. A new ethanol ready hose cured the problemo. Yes I know no ethanol but I run additives and have no problems for over 10 years except the hose. I also run the fuel out of the engine when sitting.
I have gone through my entire fuel system from tank pickup to carbs. I pressure tested the fuel line and connectors under water and looked for bubbles - there were none. I put on some clear fuel line as shown and saw lots of air getting in. It turns out to be an el-cheapo Walmart fuel connector. Replaced with an OMC and it cleared up my problems. Thanks for the tips!
I once had an 85 Johnson that would suddenly just run out of fuel. If it sat, off, for a few minutes, it might run for several more hours before acting up again. Of course, catching it in the act became a challenge. Starting at the engine and working toward the tank, we finally found it. Someone, probably me, had dropped the cap from a plastic oil container in the fuel filler neck. That cap worked its way into the tank and would sometimes get sucked onto the pick up tube. We removed the tank, cleaned it out and that engine ran for many more years without so much as a hiccup.
Hey Aaron, great video as always. Everything was on point. Don't forget about clogged/heavily restricted fuel tank vents, that will also prevent fuel flow, especially if the tank is a newer EPA style tank. #fuelproblems #nofuel #outboards
Sure wish I had seen this video BEFORE I put my boat in the shop. 4 weeks and $1000 later they diagnosed the anti siphon valve issue. I need to keep up with your videos so I can learn more about my boat. Thanks
Just had a sneaky one. A nice Evinrude kept running out of fuel. No air bubbles or flat bulb. Lift pump and high pressure pump both had great output, yet still running out of fuel. Was the vapor relief HOSE (not the float switch) from the VST. That hose lets air/vaport out of the VST. The clogged hose was pressurizing the VST, not allowing fuel to enter. Was a pain to find, but I'll always remember that one. Hopefully, this tip will help you one day, as your tips have helped me in the past!
Was wondering if you could tell me how you figured this out. I think I am having the same issue. When I feed the VST (FSM) via a clean jar of fuel, I can see air bubbles exiting the fuel hose into the jar, like a steady stream. I am guess this means vapor in the tank has no other way to escape because my regulator is failing or the hose is clogged.
@@AlexTheMD ut was because everything else tested correctly. Lift pump was strong, high pressure pump was strong, everything clean. If the lid of the vst was off, it filled up fast. When on, it wouldn't. Process of elimination. I hope this helps.
I have a problem on a yamaha 40 hp four stroke it run out of fuel n when i pump the bulb it work find again for about ten minutes and then do the same thing
Having a fuel issue right now on 2018 Mercury 150 4 stroke. Complete new fuel system from tank to water separator to motor. Still having an is with motor missing wen under a load.
Took my uncle out fishing told him to fill the boat went inside the bait shop to get bait came back out he pump 200 dollars of gas in my pole holder lol I'm a little late on the #gasleak though 😄 great channel wish you were in NJ I would bring my boat to you instantly you have save me a lot of money and time keep it going
Not a boat but my Ducati died one time when pulling into my driveway. Removed the gas filler and reached into the tank (drained first) and found that the hose popped off the top of the fuel pump. You could hear it turn on to prime but had no pressure. Took the opportunity to replace the fuel filter since it’s in the tank too. Enjoy your videos. Will have a boat some day..they will help me be ready. #gasleak
I replaced 40hp with 90hp Merc on pontoon boat. I installed water separator in-line and could not get primer bulb to get hard. It was getting difficult to start so I took it out of line and that seemed to correct THAT issue. I still have issue where motor tops out at 4000 rpm full throttle and after a few minutes suddenly breaks free to max rpm of 5500…?
One thing worth remembering is your fuel tank breather, external tanks have a valve that needs to be open in the running position and closed when not in use, easily overlooked.
I have a Johnson GT 150 that runs out of fuel in the carbs. I suspect the VRO pump is failing because I have checked/replaced every part of the fuel system leading up to the pump and one time I got the VRO flow warning chime. Another thing is that it seems to run well when I pump the primer ball but it takes very little run time for the primer ball to get soft again and the motor to start starving for fuel.
Picked up a new to me boat with racor water separators sands the filters and installed new ever thing else wiring,engines ever thing! but one engine would get really surgery at WOT couldn't find what was the issue after months of trouble shooting i finally removed the racor filter mount only to find a bug nest inside the racor mount , it looked like a tiny cigar that was blocking the fuel passage to the outlet hose.
Half way across the lake the primer bulb collapses and the motor dies. Got the boat home and checked the fuel line and didn't find a problem. Now that I see how the pickup tube comes out of the tank I can look at that too. Taking more tools with me the next time I go to the lake.
#gasleak ..Had fuel hose inner lining become hard/ brittle and start separating from the outer rubber (from using ethanol).This contaminated the system and also resulted in a "flap" / or check valve effect causing a fuel restriction. Upgraded the hoses , replaced filters and the fuel pump and that solved the issue. Thanks for this informative tutorial on diagnosing the fuel system.
When I lived in whidby island Washington I had a 30’ boat with a 6 cylinder engine the fuel pump went out before deception pass and it took us about five hours to figure it out and get it fixed in able to get up the pass back to the trailer
I have what I think is a fuel problem now with my 2018 Suzuki 60 hp motor. It idles kinda ok, but when I give it power it feels and acts like it is running out of gas. I changed the fuel filter, spark plugs and put fresh gas. Also changed the connector that connects from the hose to the tank. It is still doing it, my next guess is changing the the low pressure fuel pump. What do you think?
After I rebuilt my classic mercury 500, I had a major problem with the carbs leaking fuel out the overflow vents. After a new set of floats and tons of settings and resetting the float level, I finally got it to seal up. #gasleak
Good info. I just recently had a fuel issue and went about the fuel line inspection process pretty much the same . I found that all and I mean all the ends of my fuel lines had gotten hard and all were letting air in the line causing my fuel system to not fill up properly. This new video you put out taught me a new way of checking it. 👍
I have 98 champion mean 16 with 90 Johnson . my fuel issue is the primer silionid let's fuel thru without power... changed the whole silionid and same issue
This is helpful. Took my first boat out today ( 2006 Ranger Z20 with a 225 Yamaha Vmax).. engine was running great then an hour in to the day cut out. Primer bulb seems cracked and work along with a section of hose on both ends. I hope this is the issue and not something more serious or complicated.
It seems that the metal canisters can rot out and leak in as little as six months. I have lost at least four. Also on that yamaha the fine screen on the side of the engine can clog but not enough to pass fuel with the primer bulb but enough that the vacuum operated lift pumps cant keep up. Cleaned or replace the fine mesh filter and off we go ! Thanks for the videos . Learn something every day !
A few stories for fuel problems. While fueling the stern tanks an employee of the fuel docks went to the bow to help out, dumped 150l of diesel in my bow water tanks. Another one, while fueling my stern diesel tanks grabbed a hose off the rack under the label "diesel", began fueling. After a while pulled the hose up to check level and noticed it didn't look right. Yup, water. A couple hundred liters of water in my fuel tanks. Pumped out the tank, got a few spare sets of water separator filter media. After running for an hour drained the bowl, after a few more changed the filters. Of course as soon as I got into rough water the turbulence stirred up all the water and the vacuum pressure started going way up on one engine, so shut down one engine and did a filter change while the boat drifted in huge waves. PITA. Now the good ones, 21' landing craft with very low hours, took it offshore and the fuel pickup in the tank came off. Had to disconnect fuel line, stick it in a 20l portable container and siphon fuel into the engine to get home. Don't know if you care about trucks, but two good ones there too. Loaded truck, fuel pump quit. Siphoned some gas out of the tank and put the portable container on the roof, a piece of insulation froman electricla wire harness for trailer lights was salvaged and used to siphon form the roof straight to the carb. Funny one; car hit a big pot hole, stopped running. After a while figured out it was no fuel, searched all over, eventually found an emergency fuel shut off switch in the trunk that was flipped to off by spare tire flopping around in the trunk. Got more, but...
I've got to try again to fix an air leak on my 115 evinrude. I checked everything from the ball to the fuel pump. It ran good the first time out, I have to keep priming the bulb for about 15 minutes while the motor is running. Keeps loosing prime. Once I get it primed after that, it runs and starts all day w/o priming again. I'll have to look at the tank again. I looked there last year and it looked good. I'll put the clear hose at the connection to the tank this year and see if I see bubbles.
Okay, old 1970's 18hp evinrude starving for fuel. Bought new primer bulb since old buld kept going soft and quit working. Still no suction from tank. Tried prime straight back into tank with out the connector at one end and still no suction. Checked both ends (male and femal) of fuel line quick connector and they were both fine givin they were also new. Straw going into tank clear of any debris. Dumbfounded as to why it won't suck out if tank.
I love your channel full of good tips. When I bought my boat I was fooled precisely because of a problem in the fuel unit (float on a 2007 Mercury 80 hp Efi) . But in the end it turned out to be favorable to my side. The technicians that the previous owner had wanted to sell a complete unit of fuel instead of making a diagnosis so the owner agreed to lower the sale price by 2k and the float Coste 70€ I only found out about this problem after I did the boat restoration.
Kinked or pinched fuel lines is my first check. I always carry a Portable on board then water and other problems won't bother it. Fresh water things don't rust out I have had water in the main tank and it took all 3 of my water separators to get me home. Someone else drove I would bleed the water off as it went into the trap, the last 2 miles was nip and tuck to makes it back. One can polish their fuel by pumping out into the traps with a electric pump and then back into the tank over and over quite common with the diesel engines.
Went nuts trying to troubleshoot this on my 94 Yamaha 150. One second she was running excellent, next thing I know she won’t go above 2,000 rpm without stalling. Replaced both fuel pumps, spin on filter and bracket, removed the ASV and checked the pickup, new OEM primer. Still no dice. Replaced all hoses EXCEPT the one in the rigging tube to engine. Well, when I pulled that out the problem was very apparent. The hose was swollen right were the rigging tube makes it’s bend on the way up to the engine. Looked like a python that swallowed a bunch of rats! Snaking in a new fuel line resulted in like new performance! Change your lines every few years. The ethanol will take them out. Even if they look good where you can see them. They could be deteriorating in places you can’t! #gasleak
Loved your video very easy to follow. I have a Mercury 9.9 Pro Kicker that I want to connect to the main gas tank. Do you have a video that would give step by step instructions as good as this video? I haven't found any thing on the internet for this. Would love to see it. thanks.
Hi im needing help ASAP.. i have a 1985 2stroke outboard 115hp mercury from last time i went out with it until now (2months) the engine does not want to start.. it CRANKS BUT WONT START.. theres spark going in,, my carbs full and even sometime overflow,.. New spark plugs, new fuel filter, new batteries and nothing just stays cranking but wont start again.. Need help please thank you very much in advance.. Thanks
I have an 80s Evinrude 50 horse 2-stroke to very simple fuel system not a bunch of stuff in line like water separators and all that kind of stuff I never have one bit of trouble with it seems like the kiss principle works here
Had a problem with my boat this weekend... After running almost full open for a while, the boat sputtered and died. I noticed the bulb ball was compressed in. I need to figure out what is going on.. #gasleak.
I have a boat that I laid up for a few years. It has a Yamaha 2004 F225. I took it to a recommended dealer. Fuel tank was drained and a 100hr service was performed. The engine idle rough and had no power and stalled when accelerating. After a back and forth with the service shop and $3500 later I decided I could do no worse. Problem was the hose clamp at the pressure side of the primer bulb was not in the center of the fitting and was loose. Since then it ran well until this trip and after 15 minutes it stalled. I went through the "repair by substitution" game, figured out how to load the Yamaha 1.33 diagnostic on my old laptop and found the Air Flow sensor was bad and a hint that the shifter cable was a little worn. Adjusted the slide in the engine, replaced the Air flow sensor. The 1st tool I will pick up now is my computer.
I have a fuel issue on my boat.. it’s weird because I have to let it idle for about a minute with warm up lever on.. once the rpms go up I know I’m good.. but it will die anytime before that.. once it’s running though it’s fine until I shut it off. Then I have to let it run for a while at idle again
I have had to replace my hose all the way from the pickup on the tank to the engine on my 225 opti it was old and like 18 years old and was sucking air every where. Very good video that you guys did. #gasleak
2021(9 hours) 50 HP 4 stroke will not pick up fuel from the tank. If I pump the ball to keep the filter full it will run perfect. I pulled the mechanical fuel pump off the back of the block. I opened it up but it looks perfect. I can't find any air leaks and I also removed the VTS pump to make sure it was not stuck open or closed, it looks new inside as well. I'm not a part changer, I am a mechanic but at this point, it looks like the mechanical pump. Any ideas?
With 9 hours, most likely it's a boat issue not an engine issue, but that's just because you say the primmer bulb keeps it running, like there there needs to be more of a vacuum to pull the fuel. I'd check the boat first, before condemning the fuel pump but hopefully you've figured this out :)
When first got into boating there was not much ethanol enhanced gasoline around, Fast forward 30 years after taking a hiatus from boating and we have ethanol, the destroyer of cheap fuel lines. When I ran into the problem it was a real head scratcher as I had changed the line from the tank to the primer bulb with one brand of line but ran out of that line. I substituted a lesser quality product from the primer bulb to the engine. This happened in the fall of one season. Come spring and I was ready to go fishing so as usual I got out the garden hose and muffs to test everything at home. Pumped up the primer to a firm feel and cranked, and cranked, and cranked. No joy. After troubleshooting I found that the cheap fuel line from the primer bulb to the engine had deteriorated and the lining turned into pieces and jelly that had gunked up the inlet at the engine. Took a couple of hours to figure it out but lesson learned. #gasleak
I am having an issue where my outboard keeps losing prime it will run fine for a while and then it's like the fuel gets shut off and the primer ball is soft
Engine was being starved of fuel immediately after a service. Priming with the bulb would remedy the issue for a minute or so. Issue was that service technician replaced the diaphragms in the fuel pump the wrong way.
Hi I have a 175 Yamaha BETO engine that sometimes cuts out when idling after out on the water most of the day. Usually no issue to get it going again but recently I was caught out in middle of Jervis Bay 🇦🇺 and had to get towed back to ramp because could not restart the engine. But later back at home I hooked up the hose to flush the engine and it fires up no problem! Serviced every year but mechanic cannot tell me what the issue is because always starts when on land. One thing I did notice this time was there was no activation /humming (fuel pump) sound when I turned the key to on position when the engine would not start. After letting it sit for about an hour I gave it another go and the fuel pump activated / humming sound could be heard and the engine started. What could be the issue of an intermittently working fuel pump ? Cheers
Most likely a bad fuel pump or weak or dying lol but also don't rule out the vapor lock issue, if the engine is hard to start after running, sometimes its a vapor lock issue :/
my boys used boat would run shortly and die out. new filters and checked the pump. all seemed ok. told him if it happened again to pop the cap off. he did. digging in further we found a plugged vent hose. #gasleak
#fuelproblems #nofuel #outboards Bought a pontoon boat last year, my first boat ever. Tested it in the yard w muffs, which Jiggled off n I ended cookin my water pump. Now I DON’T trust the muffs lol. New water pump and put the leg in a barrel full of water, tested fine!! I’m so excited I even invite a boat load of friends for my maiden voyage.... During testing in my yard, the boat was bow down. In the water, the boat was stern down. Runs n idles fine until we get things loaded up n head out on the water. Then the engine dies as we’re about 50 yards from shore & absolutely no start after that. Guess I’m lucky I had lots of spare bodies to help me paddle our way... LOL Lucky for us, our friendly neighborhood boaters out on the water seen our plight n offered to tow us back to shore, God Bless em!! They tried to help by assisting in some trouble shooting n checking n swapping plugs even, which he gave me. Long story short, turns out there was jus enough water in the tank to put the pickup tube under water when I revved it up n headed for open water. We ate our lunch in the shade of some big spruce trees that afternoon, luckily nobody got a sunburn that day lol. Got her loaded up n home. Checked compression then I installed a cheap inline filter to confirm my theory of water in the fuel. Tested in the barrel of water in my yard, water showed up in the filter. I drained my tank n was AMAZED by how much water was actually in the fuel tank. Mounted a water separator and added a Jerry can of Fresh New fuel and away she went. Hasn’t hesitated at all since n I check constantly for fuel contamination. Thanks for reading folks, HAPPY BOATING Y’ALL!!!
I have 2 ox66 250s, park them running and both won’t start. I checked the filters, high and low fuel pump, injector and still won’t start. I also drained the fuel system and ran it off a gallon bottle thinking it was old gas in the boat tank but still nothing. I sprayed quick start in intake fires right up then dies. It seems like a fuel problem but everything checks out good. Not sure what else can be the problem.
Idk are you saying it won't start, like it won't turn over or it will turn over but won't start? Interesting that it is both engines, idk if you are looking at a fuel issue when you have both engines not starting, maybe the lanyard, or something like that, hard to say what is going on.
@@BornAgainBoating it turns over but won’t start. If you use quick start fluid they will start right up then dies off. What’s puzzling is both are doing it now but were left running. I would think the lanyard would stop the spark but both engines has spark, fresh fuel, and all injectors spraying.
I had a leak a couple years ago at a tee fitting between two carbs. I corrected it by replacing the tee, but now my alarm goes off when I am at wot. Cant quit figure it out. The bulb stays solid so it doesn't seem to be starving or restricted at the tank.
@@BornAgainBoating From what I read there are only 2 alarms Over Heat and Low Fuel Pressure. When I let off the throttle it goes away, so that rules out heat.
I know this is 2 years old but I think im having the same problem. Would your motor run fine for awile and then all of a sudden go from cruise to it starving out and then having problems starting it back up?
I had a garage boat mechanic do my annual service on a mercury pro xs 225. Idiot shredded the fuel filter on top of the vst so he thought he could use a hammer and flat head to remove it. I got it back and hit the lake without him telling me what happened. Engine was idling fine but would sputter and have trouble trying to plane. I went through 3 shops trying to figure it out and the last one did. There were little red chunks from the filter housing inside the vst that was blocking the float causing my engine to run out of fuel. So now I service the boat myself.
Born Again Boating yup, tell me about it. I paid $120 twice for 2 diagnostic fees and dropped another $1200 for the final fix, but man it felt so nice to have a perfect running motor.
Thanks for the video: I am not sure why my motor (2002 (100 hp) Yamaha 4 stroke) Kills when I put it into gear. I tried putting it in Natural and advance the Idol speed to 2000 rpm for about 3 minutes, when I put it into gear, it kills. It did set up for about 6 months with out running it. I drained the tank and tried to clean out the bottom. I don't think there is any blockage. The boat place is like 6 months before they can look at it. ha. any comments apricated Thanks Gene
Great video about #gasleak. I didn't know about the anti siphon valve. I am building a small flats boat with an internal fuel tank and was planning to run the fuel line under the bottom deck but now I think I will run it just under the gunnel to avoid needing an anti siphon valve.
My fuel issue was when a boat dealer at El Dorado Lake, KS did a recall repair replacing the fuel pump on my Mercury outboard & forgot to hook one of the fuel lines back up! MAJOR #gasleak
This past labor day Monday. Ran into fuel/air problem. F-ing choke wouldn't open and engine didn't want to run. then, i ran into issues with fuel leaking from near the carburetor. Unfortunately, i have a "rare" motor. Andi don't mean "rare" as in a unicorn, i mean rare as in i apparently have an ogre for an outboard so parts are super hard to find around here and a outboard tech that is willing to work on it is even harder to find. 1994-95 2 stroke 3 cylinder...wait for it... 70hp Force by Mercury Marine. I don't mind the bad reputation people say about them, the issue is parts are scarce.
My boat last summer would drain the fuel bowl dry on the carb when under WOT. I kept troubleshooting and it kept being the water separator. It turns out there was trash in the tank and it kept clogging filters quickly. Cleaned the tank and fixed the issue. #gasleak
my primer bulb was plum flat while the engine was starving for fuel. though it could be the primer bulb so i went out and got me a new one. before i head out to the lake i done some test at home and let the engine idle. the new primer bulb was doing its job with no restriction on the fuel system. let the engine warm up and every thing checks out. head back out to the lake and found out the primer bulb suck in flat again. the engine will not run no more than 1500 RPM. it will sit there and idle but will not run. this time the problem gotta be related to the anti siphon valve or pick up tube. what a total nightmare.
I’ve got a 2004 70 Yamaha 2 stroke It only will run with the red fuel enrichment valve on, runs great with it on but not in normal or closed position NEW FUEL PUMP CARBS CLEANED NEW GAS TANK AND PRIMER any ideas? Maybe carbs aren’t cleaned well
A really common problem I had while living and working on a boat was water contamination in portable fuel containers for my RHIB. Doesn't seem to matter what kind of fuel additives or containers are used, all the respiration of moist air eventually gets some water in there. Usually only problematic when running low RPM in rough weather for a long time, the low fuel flow rate would allow accumulation, and the turbulence would stir up stuff in the tanks a little more. Anyways, with my Yamaha outboards they typically had three carbs, and the lowest carb would always be the first to get a little clogged up. That lower cylinder would cut out and lose a little power, whenever that happened I could just turn to run in the trough of the waves, open up the throttles and clear out the water just by running high RPM for a few seconds. I did have to rebuild the carbs while offshore once, don't recommend it. In hindsight, more frequent fuel filter changes would have been the correct fix for that problem.
I have a 96 150 Yamaha 2 stroke been having so many problems with getting fuel to the engine replaced almost everything fuel water separator new lines new tank but I cant seem to figure out why I cant get gas to the engine
@@BornAgainBoating When I take the fuel line off the fuel water separator and place it directly into the gas tank I have onboard it sucks gas. I'm going to pick up a new primer bulb and line today when I connect the male and female piece there seems to be a air gap hoping its that fingers crossed. Thank you for the reply and the AMAZING video series.
#gasleak My 2018 90hp merc. Has a lemon issue the inline fuel hose keeps breaking when ever the outboard is trimmed up or if taking a sharp turn. Left me stranded twice. I always carry an extra hose now just in cause it happens.
my engine has a bad idle speed and it doesn't go up past 5000 rpm. I already replaced the fuel filter ( which the previous owner guaranteed to have changed but he didn't ) - and I also cleaned the injectors - fuel rail - and sensors. it's a four-stroke EFI Mercury outboard engine. I haven't tested it at sea after the changes, but the idle speed still oscilates. I'm hoping the least now I can cross the 5000 rpm limit. I don't have a way to check the iac valve, and it's too expensive to be easily replaced here in Brazil, and since the oscilation is not so much and the engine doesn't stall. I am not gonna touch it.
hey! yeah, i have a problem on my 90hp 2001 mercury (4 carbs, not injection), it will idle and do low speed, but when its hot, it you try to rev it up, power up, speed up, it will start shaking and not go above 2.5-3k rpm.. ill check all my fuel lines from the tank to the engine this week, and as someone here allso mentioned ill have to check if the tank air vent, because i can pressurise the primer bulb, but the pressure wont stay there for more than a few sec, so i HOPE there is just a clogged / corroded outlet / airvent on the tank... ill try a sepparate tank today, skipping all the old lines, testing if my problemm lies in the onboard aluminium tank...which i hope. Tanks for this video, very informative! #gasleak #airleak #fuelproblems
I have a 150 Mercury that after idling for a while while drifting the ball gets soft and engine stalls. Once this starts your fishing day is over because it continues to happen. Ty
I absolutely love this channel! Do you have any advice? My 26 foot twin engine four stroke outboard‘s bogged down while accelerating but then are fine until they reach about 4500 RPMs. The bog down is well at high on speed. However, while running when The primer bulbs are pumped it kicks up and runs fine for about 10 seconds. I replaced the fuel water separator‘s, and I am waiting for the new fuel strainers. Since it is happening with both motors I’m thinking it may be the fuel pick up strainer in the gas tank. From there once determined it’s not any hoses,,I’m thinking about replacing the fuel pumps, which I understand are only good for about 3 to 4 years
Hi! I have a problem. I have a Yamaha 60 horsepower high thrust engine and every time I start the cold engine it stops and after the second start it doesn't stop. Why do you think it stops at the first start? I thank and appreciate the efforts to support the global community of boat lovers.
2000 Stingray 220LX w/ 5.7 EFI Mercuiser kept burning up the high PSI fuel pump that feeds the injectors. I went through two warranty pump changes before the found the pick up tube in the tank was crushed from the factory. I have since also added a low PSI, high volume pump between the tank and the fuel/water filter. 18 years and 1200 hours later with no fuel problems (knock on wood). #gasleak
As an automotive mechanic and owner to a "new to me" 20' bay boat, I frigging LOVE this channel! Thanks man!
Man, that equipment would be a lifesaver for me!! I'm a Mobile Outboard Tech in Boston, MA and had a NIGHTMARE last season. 31' Contender with twin 300 HDPI's wasn't winterized (fuel system wasn't drained). Both motors needed VST cleaned, medium pressure fuel filters, medium pressure fuel pump, cleaned injectors and changed mystery filters. Motors still ran like crap, stalled out, idled poorly and no WOT. The owner assured me the fuel system on the boat was fine (fuel lines, water separators, tanks, pickup tubes ect.). Well after a couple thousand in motor work, I insisted we take a look at the boat fuel system. Well turns out the pickup screens were clogged and causing the fuel pressure to drop from 980PSI to 150PSI!! I use ALOT of your tips/tricks day to day, and I cannot thank you enough for taking the time to make these videos! Thanks AGAIN! #gasleak
Man 300 HDPI's can be a nightmare. Can't imagine doing the fuel systems on TWO of them. Good work mate
You “bail out” Chris in Gloucester?
MAT I'm Confused?
@@ravosamarine nevermind, i thought u could be chris from gloucester who does mobile outboard/boat repairs.
MAT Gotcha. I am Chris and manage Ravosa Marine Services. We do service Gloucester, might be another Chris you are thinking of however.
Brilliant thank you, so informative yet so simple, I had a stroke 13 years ago, I was totally paralysed down the right hand side and blind in the right eye, To see me now you would never believe I ever had a stroke. but I have short term memory loss and I can't learn nothing new, I don't have a boat yet but I want a Honwave T32 IE with a 15hp outboard. I am saving as many good channels as I can to learn about my new hobby , after my stroke I was watching kids channels to teach me things because they put it over so simple I can take it in. Your channel is like that for me I understood it all, That I am more grateful than you can imagine. Thanks for sharing Ray K. UK. YNWA.
8months after buying an old boat, replacing the water/fuel separator the filter went bad. Reverted back to this video as to why the engine didnt have fuel and it saved the day. TY and keep @ it
Great video, never thought about using a clear hose to check for air leaks. Having a #gasleak sucks! You guys are the best for sharing all these tips and tricks! Thank you
We had a boat that would fall on its face just randomly, we changed a bunch of things trying to get rid of the problem , it turned out it was the internals of the brand new oem primer bulb. Love to watch y’all’s channel , picking up bits & pieces to help with the next adventure, thanks .
My last fuel problem stemed from the ethanol gas eating the inside of the fuel line and clogging it down. A new ethanol ready hose cured the problemo. Yes I know no ethanol but I run additives and have no problems for over 10 years except the hose. I also run the fuel out of the engine when sitting.
I have gone through my entire fuel system from tank pickup to carbs. I pressure tested the fuel line and connectors under water and looked for bubbles - there were none. I put on some clear fuel line as shown and saw lots of air getting in. It turns out to be an el-cheapo Walmart fuel connector. Replaced with an OMC and it cleared up my problems. Thanks for the tips!
I once had an 85 Johnson that would suddenly just run out of fuel. If it sat, off, for a few minutes, it might run for several more hours before acting up again.
Of course, catching it in the act became a challenge.
Starting at the engine and working toward the tank, we finally found it.
Someone, probably me, had dropped the cap from a plastic oil container in the fuel filler neck. That cap worked its way into the tank and would sometimes get sucked onto the pick up tube.
We removed the tank, cleaned it out and that engine ran for many more years without so much as a hiccup.
Hey Aaron, great video as always. Everything was on point. Don't forget about clogged/heavily restricted fuel tank vents, that will also prevent fuel flow, especially if the tank is a newer EPA style tank. #fuelproblems #nofuel #outboards
Sure wish I had seen this video BEFORE I put my boat in the shop. 4 weeks and $1000 later they diagnosed the anti siphon valve issue. I need to keep up with your videos so I can learn more about my boat. Thanks
I’m trying to add a second fuel cell to my allsison where the oil reservoir used to be. I switched to an 8 cylinder 4 stroke
Just had a sneaky one. A nice Evinrude kept running out of fuel. No air bubbles or flat bulb. Lift pump and high pressure pump both had great output, yet still running out of fuel. Was the vapor relief HOSE (not the float switch) from the VST. That hose lets air/vaport out of the VST. The clogged hose was pressurizing the VST, not allowing fuel to enter. Was a pain to find, but I'll always remember that one. Hopefully, this tip will help you one day, as your tips have helped me in the past!
Was wondering if you could tell me how you figured this out. I think I am having the same issue. When I feed the VST (FSM) via a clean jar of fuel, I can see air bubbles exiting the fuel hose into the jar, like a steady stream. I am guess this means vapor in the tank has no other way to escape because my regulator is failing or the hose is clogged.
@@AlexTheMD ut was because everything else tested correctly. Lift pump was strong, high pressure pump was strong, everything clean. If the lid of the vst was off, it filled up fast. When on, it wouldn't. Process of elimination. I hope this helps.
I have a problem on a yamaha 40 hp four stroke it run out of fuel n when i pump the bulb it work find again for about ten minutes and then do the same thing
Having a fuel issue right now on 2018 Mercury 150 4 stroke. Complete new fuel system from tank to water separator to motor. Still having an is with motor missing wen under a load.
Those anti siphon valves have been the culprit 80% of the time. Great channel guys! ❤
Thank you!
Took my uncle out fishing told him to fill the boat went inside the bait shop to get bait came back out he pump 200 dollars of gas in my pole holder lol I'm a little late on the #gasleak though 😄 great channel wish you were in NJ I would bring my boat to you instantly you have save me a lot of money and time keep it going
Oh wow!
Not a boat but my Ducati died one time when pulling into my driveway. Removed the gas filler and reached into the tank (drained first) and found that the hose popped off the top of the fuel pump. You could hear it turn on to prime but had no pressure. Took the opportunity to replace the fuel filter since it’s in the tank too. Enjoy your videos. Will have a boat some day..they will help me be ready. #gasleak
Great!
I replaced 40hp with 90hp Merc on pontoon boat. I installed water separator in-line and could not get primer bulb to get hard. It was getting difficult to start so I took it out of line and that seemed to correct THAT issue. I still have issue where motor tops out at 4000 rpm full throttle and after a few minutes suddenly breaks free to max rpm of 5500…?
One thing worth remembering is your fuel tank breather, external tanks have a valve that needs to be open in the running position and closed when not in use, easily overlooked.
I have a Johnson GT 150 that runs out of fuel in the carbs. I suspect the VRO pump is failing because I have checked/replaced every part of the fuel system leading up to the pump and one time I got the VRO flow warning chime. Another thing is that it seems to run well when I pump the primer ball but it takes very little run time for the primer ball to get soft again and the motor to start starving for fuel.
Picked up a new to me boat with racor water separators sands the filters and installed new ever thing else wiring,engines ever thing! but one engine would get really surgery at WOT couldn't find what was the issue after months of trouble shooting i finally removed the racor filter mount only to find a bug nest inside the racor mount , it looked like a tiny cigar that was blocking the fuel passage to the outlet hose.
Best channel on boats I've found! Thank you.
Welcome aboard!
Half way across the lake the primer bulb collapses and the motor dies. Got the boat home and checked the fuel line and didn't find a problem. Now that I see how the pickup tube comes out of the tank I can look at that too. Taking more tools with me the next time I go to the lake.
#gasleak ..Had fuel hose inner lining become hard/ brittle and start separating from the outer rubber (from using ethanol).This contaminated the system and also resulted in a "flap" / or check valve effect causing a fuel restriction. Upgraded the hoses , replaced filters and the fuel pump and that solved the issue. Thanks for this informative tutorial on diagnosing the fuel system.
When I lived in whidby island Washington I had a 30’ boat with a 6 cylinder engine the fuel pump went out before deception pass and it took us about five hours to figure it out and get it fixed in able to get up the pass back to the trailer
I have what I think is a fuel problem now with my 2018 Suzuki 60 hp motor. It idles kinda ok, but when I give it power it feels and acts like it is running out of gas. I changed the fuel filter, spark plugs and put fresh gas. Also changed the connector that connects from the hose to the tank. It is still doing it, my next guess is changing the the low pressure fuel pump. What do you think?
After I rebuilt my classic mercury 500, I had a major problem with the carbs leaking fuel out the overflow vents. After a new set of floats and tons of settings and resetting the float level, I finally got it to seal up. #gasleak
Good info. I just recently had a fuel issue and went about the fuel line inspection process pretty much the same . I found that all and I mean all the ends of my fuel lines had gotten hard and all were letting air in the line causing my fuel system to not fill up properly. This new video you put out taught me a new way of checking it. 👍
Great!
I have 98 champion mean 16 with 90 Johnson . my fuel issue is the primer silionid let's fuel thru without power... changed the whole silionid and same issue
First thing to check is the primer bulb. I have replaced so many. Just because they are in the sun most the time
I got a 2005 key largo with a 200 Yamaha HPDI and it does have that anti siphon valve.
I wonder if it need it?
Having a lot of issues with my fuel; glad I’ve subscribed to the channel, I’m hoping it will iron out the issues
Will a collapse line before the primer bulb cause the bulb go flat just stupid question
This is helpful. Took my first boat out today ( 2006 Ranger Z20 with a 225 Yamaha Vmax).. engine was running great then an hour in to the day cut out. Primer bulb seems cracked and work along with a section of hose on both ends. I hope this is the issue and not something more serious or complicated.
It seems that the metal canisters can rot out and leak in as little as six months. I have lost at least four. Also on that yamaha the fine screen on the side of the engine can clog but not enough to pass fuel with the primer bulb but enough that the vacuum operated lift pumps cant keep up. Cleaned or replace the fine mesh filter and off we go ! Thanks for the videos . Learn something every day !
Would love to see a video detailing the making and uses of this test kit and other testing kits you make. GOLD!
I haven't run dry yet but this is my first year as a boat owner. I have Simmons Sea Skiff 20' with a Tohatsu 70HP. Time will tell.
A few stories for fuel problems.
While fueling the stern tanks an employee of the fuel docks went to the bow to help out, dumped 150l of diesel in my bow water tanks.
Another one, while fueling my stern diesel tanks grabbed a hose off the rack under the label "diesel", began fueling. After a while pulled the hose up to check level and noticed it didn't look right. Yup, water. A couple hundred liters of water in my fuel tanks.
Pumped out the tank, got a few spare sets of water separator filter media.
After running for an hour drained the bowl, after a few more changed the filters.
Of course as soon as I got into rough water the turbulence stirred up all the water and the vacuum pressure started going way up on one engine, so shut down one engine and did a filter change while the boat drifted in huge waves. PITA.
Now the good ones, 21' landing craft with very low hours, took it offshore and the fuel pickup in the tank came off.
Had to disconnect fuel line, stick it in a 20l portable container and siphon fuel into the engine to get home.
Don't know if you care about trucks, but two good ones there too.
Loaded truck, fuel pump quit. Siphoned some gas out of the tank and put the portable container on the roof, a piece of insulation froman electricla wire harness for trailer lights was salvaged and used to siphon form the roof straight to the carb.
Funny one; car hit a big pot hole, stopped running.
After a while figured out it was no fuel, searched all over, eventually found an emergency fuel shut off switch in the trunk that was flipped to off by spare tire flopping around in the trunk.
Got more, but...
Thanks for sharing!
I've got to try again to fix an air leak on my 115 evinrude. I checked everything from the ball to the fuel pump. It ran good the first time out, I have to keep priming the bulb for about 15 minutes while the motor is running. Keeps loosing prime. Once I get it primed after that, it runs and starts all day w/o priming again. I'll have to look at the tank again. I looked there last year and it looked good. I'll put the clear hose at the connection to the tank this year and see if I see bubbles.
Okay, old 1970's 18hp evinrude starving for fuel. Bought new primer bulb since old buld kept going soft and quit working. Still no suction from tank. Tried prime straight back into tank with out the connector at one end and still no suction. Checked both ends (male and femal) of fuel line quick connector and they were both fine givin they were also new. Straw going into tank clear of any debris. Dumbfounded as to why it won't suck out if tank.
I love your channel full of good tips. When I bought my boat I was fooled precisely because of a problem in the fuel unit (float on a 2007 Mercury 80 hp Efi) . But in the end it turned out to be favorable to my side. The technicians that the previous owner had wanted to sell a complete unit of fuel instead of making a diagnosis so the owner agreed to lower the sale price by 2k and the float Coste 70€ I only found out about this problem after I did the boat restoration.
Nice!
I am having this exact problem. Fuel pump loses prime and fuel runs out. You can see air running in the lines to the carbs
Kinked or pinched fuel lines is my first check. I always carry a Portable on board then water and other problems won't bother it. Fresh water things don't rust out I have had water in the main tank and it took all 3 of my water separators to get me home. Someone else drove I would bleed the water off as it went into the trap, the last 2 miles was nip and tuck to makes it back. One can polish their fuel by pumping out into the traps with a electric pump and then back into the tank over and over quite common with the diesel engines.
Went nuts trying to troubleshoot this on my 94 Yamaha 150. One second she was running excellent, next thing I know she won’t go above 2,000 rpm without stalling. Replaced both fuel pumps, spin on filter and bracket, removed the ASV and checked the pickup, new OEM primer. Still no dice. Replaced all hoses EXCEPT the one in the rigging tube to engine. Well, when I pulled that out the problem was very apparent. The hose was swollen right were the rigging tube makes it’s bend on the way up to the engine. Looked like a python that swallowed a bunch of rats! Snaking in a new fuel line resulted in like new performance! Change your lines every few years. The ethanol will take them out. Even if they look good where you can see them. They could be deteriorating in places you can’t! #gasleak
How about the time the plastic like liner in the non ethanol fuel line from my fuel tank separated a blocked the line
Loved your video very easy to follow. I have a Mercury 9.9 Pro Kicker that I want to connect to the main gas tank. Do you have a video that would give step by step instructions as good as this video? I haven't found any thing on the internet for this. Would love to see it. thanks.
Can you use clear fuel line permanently? It would be helpful to see that your holding a prime and not taking in air at all times
Hi im needing help ASAP.. i have a 1985 2stroke outboard 115hp mercury from last time i went out with it until now (2months) the engine does not want to start.. it CRANKS BUT WONT START.. theres spark going in,, my carbs full and even sometime overflow,..
New spark plugs, new fuel filter, new batteries and nothing just stays cranking but wont start again..
Need help please thank you very much in advance..
Thanks
I have an 80s Evinrude 50 horse 2-stroke to very simple fuel system not a bunch of stuff in line like water separators and all that kind of stuff I never have one bit of trouble with it seems like the kiss principle works here
Had a problem with my boat this weekend... After running almost full open for a while, the boat sputtered and died. I noticed the bulb ball was compressed in. I need to figure out what is going on.. #gasleak.
I have a boat that I laid up for a few years. It has a Yamaha 2004 F225. I took it to a recommended dealer. Fuel tank was drained and a 100hr service was performed. The engine idle rough and had no power and stalled when accelerating. After a back and forth with the service shop and $3500 later I decided I could do no worse.
Problem was the hose clamp at the pressure side of the primer bulb was not in the center of the fitting and was loose. Since then it ran well until this trip and after 15 minutes it stalled. I went through the "repair by substitution" game, figured out how to load the Yamaha 1.33 diagnostic on my old laptop and found the Air Flow sensor was bad and a hint that the shifter cable was a little worn. Adjusted the slide in the engine, replaced the Air flow sensor. The 1st tool I will pick up now is my computer.
I have a fuel issue on my boat.. it’s weird because I have to let it idle for about a minute with warm up lever on.. once the rpms go up I know I’m good.. but it will die anytime before that.. once it’s running though it’s fine until I shut it off. Then I have to let it run for a while at idle again
I have had to replace my hose all the way from the pickup on the tank to the engine on my 225 opti it was old and like 18 years old and was sucking air every where. Very good video that you guys did. #gasleak
2021(9 hours) 50 HP 4 stroke will not pick up fuel from the tank. If I pump the ball to keep the filter full it will run perfect. I pulled the mechanical fuel pump off the back of the block. I opened it up but it looks perfect. I can't find any air leaks and I also removed the VTS pump to make sure it was not stuck open or closed, it looks new inside as well. I'm not a part changer, I am a mechanic but at this point, it looks like the mechanical pump. Any ideas?
With 9 hours, most likely it's a boat issue not an engine issue, but that's just because you say the primmer bulb keeps it running, like there there needs to be more of a vacuum to pull the fuel. I'd check the boat first, before condemning the fuel pump but hopefully you've figured this out :)
When first got into boating there was not much ethanol enhanced gasoline around, Fast forward 30 years after taking a hiatus from boating and we have ethanol, the destroyer of cheap fuel lines. When I ran into the problem it was a real head scratcher as I had changed the line from the tank to the primer bulb with one brand of line but ran out of that line. I substituted a lesser quality product from the primer bulb to the engine. This happened in the fall of one season. Come spring and I was ready to go fishing so as usual I got out the garden hose and muffs to test everything at home. Pumped up the primer to a firm feel and cranked, and cranked, and cranked. No joy. After troubleshooting I found that the cheap fuel line from the primer bulb to the engine had deteriorated and the lining turned into pieces and jelly that had gunked up the inlet at the engine. Took a couple of hours to figure it out but lesson learned. #gasleak
I am having an issue where my outboard keeps losing prime it will run fine for a while and then it's like the fuel gets shut off and the primer ball is soft
My marcury 40 4S obm not produce more than 3000 rpm what is the possible couses ?
I had small pieces of plastic in the pick up tube strainer multiple times which caused the priming ball to collapse
Engine was being starved of fuel immediately after a service. Priming with the bulb would remedy the issue for a minute or so. Issue was that service technician replaced the diaphragms in the fuel pump the wrong way.
Still new to boating , hoping my aircraft mechanic experience will help with working on the boat
My fuel line split open a few weeks ago! #gasleak are awful! Thankfully I replaced the line and we were good to go...
Hi I have a 175 Yamaha BETO engine that sometimes cuts out when idling after out on the water most of the day.
Usually no issue to get it going again but recently I was caught out in middle of Jervis Bay 🇦🇺 and had to get towed back to ramp because could not restart the engine. But later back at home I hooked up the hose to flush the engine and it fires up no problem! Serviced every year but mechanic cannot tell me what the issue is because always starts when on land. One thing I did notice this time was there was no activation /humming (fuel pump) sound when I turned the key to on position when the engine would not start. After letting it sit for about an hour I gave it another go and the fuel pump activated / humming sound could be heard and the engine started. What could be the issue of an intermittently working fuel pump ? Cheers
Most likely a bad fuel pump or weak or dying lol but also don't rule out the vapor lock issue, if the engine is hard to start after running, sometimes its a vapor lock issue :/
my boys used boat would run shortly and die out. new filters and checked the pump. all seemed ok. told him if it happened again to pop the cap off. he did. digging in further we found a plugged vent hose. #gasleak
Also in portable fuel tanks the fuel cap not breathing can cause issues
#fuelproblems #nofuel #outboards
Bought a pontoon boat last year, my first boat ever. Tested it in the yard w muffs, which Jiggled off n I ended cookin my water pump. Now I DON’T trust the muffs lol.
New water pump and put the leg in a barrel full of water, tested fine!! I’m so excited I even invite a boat load of friends for my maiden voyage....
During testing in my yard, the boat was bow down. In the water, the boat was stern down. Runs n idles fine until we get things loaded up n head out on the water. Then the engine dies as we’re about 50 yards from shore & absolutely no start after that. Guess I’m lucky I had lots of spare bodies to help me paddle our way... LOL
Lucky for us, our friendly neighborhood boaters out on the water seen our plight n offered to tow us back to shore, God Bless em!! They tried to help by assisting in some trouble shooting n checking n swapping plugs even, which he gave me.
Long story short, turns out there was jus enough water in the tank to put the pickup tube under water when I revved it up n headed for open water.
We ate our lunch in the shade of some big spruce trees that afternoon, luckily nobody got a sunburn that day lol.
Got her loaded up n home. Checked compression then I installed a cheap inline filter to confirm my theory of water in the fuel. Tested in the barrel of water in my yard, water showed up in the filter. I drained my tank n was AMAZED by how much water was actually in the fuel tank. Mounted a water separator and added a Jerry can of Fresh New fuel and away she went. Hasn’t hesitated at all since n I check constantly for fuel contamination.
Thanks for reading folks, HAPPY BOATING Y’ALL!!!
I have 2 ox66 250s, park them running and both won’t start. I checked the filters, high and low fuel pump, injector and still won’t start. I also drained the fuel system and ran it off a gallon bottle thinking it was old gas in the boat tank but still nothing. I sprayed quick start in intake fires right up then dies. It seems like a fuel problem but everything checks out good. Not sure what else can be the problem.
Idk are you saying it won't start, like it won't turn over or it will turn over but won't start? Interesting that it is both engines, idk if you are looking at a fuel issue when you have both engines not starting, maybe the lanyard, or something like that, hard to say what is going on.
@@BornAgainBoating it turns over but won’t start. If you use quick start fluid they will start right up then dies off. What’s puzzling is both are doing it now but were left running. I would think the lanyard would stop the spark but both engines has spark, fresh fuel, and all injectors spraying.
04:18 No rust, great boat ! 😎 Yep, but it's a good place to do a training video, guaranteed everything is broken !
Hey on my 50hp out bord motor 2 stroke I get ges to the fuil filler fuil then motor runs a bit the it just runs out of gas thank you
What if you don’t get a reading on the fuel pump electrical plug
I had a leak a couple years ago at a tee fitting between two carbs. I corrected it by replacing the tee, but now my alarm goes off when I am at wot.
Cant quit figure it out. The bulb stays solid so it doesn't seem to be starving or restricted at the tank.
You'll want to figure out what the alarm is, it's probably not a fuel issue :)
@@BornAgainBoating From what I read there are only 2 alarms Over Heat and Low Fuel Pressure. When I let off the throttle it goes away, so that rules out heat.
Had a fuel issue a few years ago where the tank vent was blocked.
I know this is 2 years old but I think im having the same problem. Would your motor run fine for awile and then all of a sudden go from cruise to it starving out and then having problems starting it back up?
I had a garage boat mechanic do my annual service on a mercury pro xs 225. Idiot shredded the fuel filter on top of the vst so he thought he could use a hammer and flat head to remove it. I got it back and hit the lake without him telling me what happened. Engine was idling fine but would sputter and have trouble trying to plane. I went through 3 shops trying to figure it out and the last one did. There were little red chunks from the filter housing inside the vst that was blocking the float causing my engine to run out of fuel. So now I service the boat myself.
WOW! Ouch :(
Born Again Boating yup, tell me about it. I paid $120 twice for 2 diagnostic fees and dropped another $1200 for the final fix, but man it felt so nice to have a perfect running motor.
Thanks for the video: I am not sure why my motor (2002 (100 hp) Yamaha 4 stroke) Kills when I put it into gear. I tried putting it in Natural and advance the Idol speed to 2000 rpm for about 3 minutes, when I put it into gear, it kills. It did set up for about 6 months with out running it. I drained the tank and tried to clean out the bottom. I don't think there is any blockage. The boat place is like 6 months before they can look at it. ha. any comments apricated Thanks Gene
Great tips, this weekend i will dubble check my fuellines, safety isue, thx
Great video about #gasleak. I didn't know about the anti siphon valve. I am building a small flats boat with an internal fuel tank and was planning to run the fuel line under the bottom deck but now I think I will run it just under the gunnel to avoid needing an anti siphon valve.
Yeah, just try to keep the hoses above the tank and then put a shut off on the water separator bracket :)
Why is my primer bulb getting hard at times and then not at times..could it be starting to go bad??
My fuel issue was when a boat dealer at El Dorado Lake, KS did a recall repair replacing the fuel pump on my Mercury outboard & forgot to hook one of the fuel lines back up! MAJOR #gasleak
This past labor day Monday. Ran into fuel/air problem. F-ing choke wouldn't open and engine didn't want to run. then, i ran into issues with fuel leaking from near the carburetor. Unfortunately, i have a "rare" motor. Andi don't mean "rare" as in a unicorn, i mean rare as in i apparently have an ogre for an outboard so parts are super hard to find around here and a outboard tech that is willing to work on it is even harder to find. 1994-95 2 stroke 3 cylinder...wait for it... 70hp Force by Mercury Marine. I don't mind the bad reputation people say about them, the issue is parts are scarce.
Very informative! Thank you for dropping some knowledge
My boat last summer would drain the fuel bowl dry on the carb when under WOT. I kept troubleshooting and it kept being the water separator. It turns out there was trash in the tank and it kept clogging filters quickly. Cleaned the tank and fixed the issue. #gasleak
my primer bulb was plum flat while the engine was starving for fuel. though it could be the primer bulb so i went out and got me a new one. before i head out to the lake i done some test at home and let the engine idle. the new primer bulb was doing its job with no restriction on the fuel system. let the engine warm up and every thing checks out. head back out to the lake and found out the primer bulb suck in flat again. the engine will not run no more than 1500 RPM. it will sit there and idle but will not run. this time the problem gotta be related to the anti siphon valve or pick up tube. what a total nightmare.
I’ve got a 2004 70 Yamaha 2 stroke
It only will run with the red fuel enrichment valve on, runs great with it on but not in normal or closed position
NEW FUEL PUMP
CARBS CLEANED
NEW GAS TANK AND PRIMER
any ideas? Maybe carbs aren’t cleaned well
A really common problem I had while living and working on a boat was water contamination in portable fuel containers for my RHIB.
Doesn't seem to matter what kind of fuel additives or containers are used, all the respiration of moist air eventually gets some water in there.
Usually only problematic when running low RPM in rough weather for a long time, the low fuel flow rate would allow accumulation, and the turbulence would stir up stuff in the tanks a little more.
Anyways, with my Yamaha outboards they typically had three carbs, and the lowest carb would always be the first to get a little clogged up.
That lower cylinder would cut out and lose a little power, whenever that happened I could just turn to run in the trough of the waves, open up the throttles and clear out the water just by running high RPM for a few seconds.
I did have to rebuild the carbs while offshore once, don't recommend it. In hindsight, more frequent fuel filter changes would have been the correct fix for that problem.
I have a 96 150 Yamaha 2 stroke been having so many problems with getting fuel to the engine replaced almost everything fuel water separator new lines new tank but I cant seem to figure out why I cant get gas to the engine
Are the fuel pumps operating properly? They might need rebuilt :/
@@BornAgainBoating When I take the fuel line off the fuel water separator and place it directly into the gas tank I have onboard it sucks gas. I'm going to pick up a new primer bulb and line today when I connect the male and female piece there seems to be a air gap hoping its that fingers crossed. Thank you for the reply and the AMAZING video series.
You put together some awesome video's ! 👍👍💚
I am a commercial fisherman we have Fuel problems All the time I have a Honda outboard would like to see some Honda videos
My yamaha 200hp is loosing fuel pressure at low ram's. I have to pump the primer bulb to get it running again. Runs all day long on plane. Any ideas?
#gasleak
My 2018 90hp merc. Has a lemon issue the inline fuel hose keeps breaking when ever the outboard is trimmed up or if taking a sharp turn. Left me stranded twice. I always carry an extra hose now just in cause it happens.
That's a rigging issue not a lemon....
@@diannawilson1329 lets just say its poorly designed~
my engine has a bad idle speed and it doesn't go up past 5000 rpm. I already replaced the fuel filter ( which the previous owner guaranteed to have changed but he didn't ) - and I also cleaned the injectors - fuel rail - and sensors. it's a four-stroke EFI Mercury outboard engine. I haven't tested it at sea after the changes, but the idle speed still oscilates. I'm hoping the least now I can cross the 5000 rpm limit. I don't have a way to check the iac valve, and it's too expensive to be easily replaced here in Brazil, and since the oscilation is not so much and the engine doesn't stall. I am not gonna touch it.
sorry for the bad english
hey! yeah, i have a problem on my 90hp 2001 mercury (4 carbs, not injection), it will idle and do low speed, but when its hot, it you try to rev it up, power up, speed up, it will start shaking and not go above 2.5-3k rpm.. ill check all my fuel lines from the tank to the engine this week, and as someone here allso mentioned ill have to check if the tank air vent, because i can pressurise the primer bulb, but the pressure wont stay there for more than a few sec, so i HOPE there is just a clogged / corroded outlet / airvent on the tank... ill try a sepparate tank today, skipping all the old lines, testing if my problemm lies in the onboard aluminium tank...which i hope.
Tanks for this video, very informative! #gasleak #airleak #fuelproblems
I have a 150 Mercury that after idling for a while while drifting the ball gets soft and engine stalls. Once this starts your fishing day is over because it continues to happen. Ty
Marine motor needs a lot of preventive maintenance in order to perform as expected year round, only a few do.
All electrical contacts needs to be looked after if wanting that component they work with to last long, on old motors is a must do...
I absolutely love this channel!
Do you have any advice? My 26 foot twin engine four stroke outboard‘s bogged down while accelerating but then are fine until they reach about 4500 RPMs. The bog down is well at high on speed. However, while running when The primer bulbs are pumped it kicks up and runs fine for about 10 seconds.
I replaced the fuel water separator‘s, and I am waiting for the new fuel strainers. Since it is happening with both motors I’m thinking it may be the fuel pick up strainer in the gas tank. From there once determined it’s not any hoses,,I’m thinking about replacing the fuel pumps, which I understand are only good for about 3 to 4 years
I had no air leak everything brand new Yamaha and my boat still vacuumed my priming bulb what could be the issue the vent everything brand new Yamaha
Hi! I have a problem. I have a Yamaha 60 horsepower high thrust engine and every time I start the cold engine it stops and after the second start it doesn't stop. Why do you think it stops at the first start? I thank and appreciate the efforts to support the global community of boat lovers.
Hard to say, spark plugs or could be the carbs or enricher. If that's the only issue, I'd leave it alone:)
2000 Stingray 220LX w/ 5.7 EFI Mercuiser kept burning up the high PSI fuel pump that feeds the injectors. I went through two warranty pump changes before the found the pick up tube in the tank was crushed from the factory. I have since also added a low PSI, high volume pump between the tank and the fuel/water filter. 18 years and 1200 hours later with no fuel problems (knock on wood). #gasleak
What cause a primer bulb go flat at full speed
Thank you on
I recognize that multi meter anywhere. You go to the one in Orlando ?
Mine doesn’t even start