2003 Yamaha 90 HP Outboard Won't Rev-up passed 2,500 RPM! FiX
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- Опубликовано: 8 сен 2024
- 2003 Yamaha 90 HP Outboard Won't Rev-up passed 2,500 RPM!
Has Good: Spark, Compression, Fuel and Clean Carbs...
The fix to this problem was a bad fuel pump diaphragm that was Flooding out the #3 cylinder. Plus the 2 stroke oil tank level sender was bad and putting this motor into limp mode you can try unplugging the sensor from the main engine harness the Pink Wire and see if that will fix your issue. Total Fix was fuel pump, and an oil level sensor for the oil tank.
Hope this helps thanks for watching if you feel like giving me a tip send it to my Venmo @ WAH420
Cheers, B
Link to my Outboard Motor Repair Page Below:
/ 203346153363750
My fuel pumps diaphragm was broken. Replaced it and now it works like a champ. Thanks
I absolutely love you man!!!! my 2008 90 2 stroke had the exact same problem and I've been chasing it for days! Tell me where I can send you a tip $$ for sharing your knowledge!!!!!
thanks for watching if you feel like giving me a tip send it to my Venmo @ WAH420
I have a 1988 90hp doing the exact same thing. I just took it off and pumped the ball like you did and fuel is leaking out of the sides. I'm going to replace it. Thanks for the video!!
I came up with this video. It help me out a lot. I have the same problem and I solved it. Thank you so much for the information.
Great Job! Thanks for the help.
I have a 150 vmax 2 stroke with two fuel pumps. Let me see which one it is.
Godspeed,
Capt Ben
Thank you for posting! Luckily mine was the same problem. Saved me a bunch of money. Cheers!
Thank you so much for the Video! It’s exactly what I needed
Soon as you said #3 jug I knew LOL !! Just found ya here Billy!!
I have an identical engine only a 2002. Mine originally ran at 5700 RPM now seems to only do 4300. I suspect spark plug but yours only does 2500 RPM with one missing so now I'm not sure. Thanks for the video!
I only get 4000rpm can you report your findings?
Mines a stinger 65 hp first series performance race engines back in the day. They jumped to 75hp stinger on the hydro plane boats.
@ Jerry
Have you checked the fuel pump to see if it leaks through the Diaphragm...
Also check your Throttle and make sure the butterflies on the carburetor are opening all the way...
Make Sure it has Blue Spark with an ignition tester with a gap of 1/4 inch or more...
If that's all good the main jet in carb is clogged...
Thanks! a bit late for reply, but after my friend gave me the coil and put on the Tohatsu outboard and it seems run good and no choking at wot now!
I also thought it was fuel or pump problem, you know sometimes reason a lot for same problem btw.
Thanks for your video and suggestion, I maybe learn more too :)
Thanks Glad i could help... You Can also find me on my FB Group Page... facebook.com/groups/203346153363750/
thats exactly what wrong with my motor... thank you so much.
My boat setup with big and small outboard, the Big is a Yamaha 2 stroke 115hp and small outboard is Tohatsu 2 stroke 18hp. Using same tank of fuel with premix gas and oil in the tank, then go to a fuel water separator filter, then I separate fuel to both outboard with two valve.
When I using the small outboard for trolling I would close the fuel valve to big outboard, so the fuel should only goes to small outboard. When using big outboard I do the same to the small outboard fuel valve.
I ran great with my big Yamaha 115 2 stroke, but problem with small Tohatsu 18hp.
The small outboard getting some trouble maybe same as this. It doesn't rev high speed, I do not have gauges for this small outboard so i don't know is it could run faster than 3000rpm, but it doesn't rev high or even it doesn't having great power to push my boat fast as other boat with same setting.
I had checked the following:
fuel line (including the valves) clean
carb cleaned
checked propeller is good
2 cylinder checked no leaking and compression good at 115psi
My friend had a same Tohatsu 18HP 2 stroke in a same 21 foot boat but his outboard runs much more powerful then mine, he said maybe the ignition system gets wrong, so next step I will ask my friend to using his outboard ignition coil to my outboard.
Or do you had idea about my case?
Thanks!
I think that’s what’s wrong with mine! Thanks⭐️✌🏾
I don't comment often but great jobs you just answered my question without a bunch of bs
I was having this same issue with my 80s model yamaha outboard 2 stroke motor. It wouldnt rev up and it smoked like hell. Was getting good compression and spark but no fire.... A buddy sent me this video. I removed the fuel pump and tore it apart and low and behold. A massive hole in the diaphram .. i ordered a new fuel pump. If this fixes the issue im sucking off 10 large mouth bass fish at once.
LoL, I'm sure this is your fix with a broken diaphram and Happy FIshing. LoL
Update.. still didnt fix the issue. Wont rev up hardly no fire in lower cylinder when trying to rev up
@@Travizzleewhat was ur issue
And what was compression numbers
@@135-j The issue was A bad rod or cracked block. After doing countless hours of work to this motor i had it on the water for 5 mins and blew a hole in the bottom of the block where i was having issues with cylinder not fireing. I pulled the motor off and set it on a stand in my barn. Thats where yamaha motors belong. On stands for show. I've never had any luck with Yamaha In my opinion it's junk In this motor just proved it I put a 115 horsepower Mercury Tower of Power on it instead. I'm extremely satisfied
Did u ever switch coils
Look, launch control are ready 🔥😅
Wanted to Add: If This Don't Fix The Limp Mode Sound and Still Won't Rev-Up!... Check or Unplug the Oil Sensor on the Oil Reserve Tank it maybe Faulty...
Cheers brother, God bless you.
Thouse engines are worth more now then when they where new
i literally just had the same issues with over heating only i found the issue, after back flushing and disassembling the entire disassemble-able parts of the water flows i found my issue was fragmented impeller peices located in the lower unit directly from the impeller pump to the feed tube the pump goes to up about 9inches into the pipe was an entire 6 peices of rubber blades now my engine ran with water during months of running before i just got sick of never going over 2400rpm, back flushing alone couldnt get the fragments out, i ended up taking a long wire and bent a tiny hook in the end and pulled each peice out one at a time. my engine seemed to run water only causing overheating when the water pressure sensor was plugged in, yes in. but this just goes to show that somtimes you really need to look hard for those peices as black in a black pipe can be mistakenly overlooked. hope this helped :)
Thank you for that great info man.. Nice one :)
I had exactly the same problem with a 90. Those see through
plastic diaphragms seem to crack easy. They are not so durable as the old rubber types where.
Fantastic video, thank you
Thanks for your help!
So when I press the primer it shouldnt pump the fuel past the fuel pump without motor running?
thank you for the video help me a lot
Thanks for the content! I'm having a problem on my 85hp 2013, after start it revs up to max / limiter.
Ok my question do you replace the pump the cylinder is ok
Replace or rebuild it, Yes
Did the fuel bulb ever get hard when you squeezed it? Or did it just stay soft?
Merienne Lynch
0 seconds ago
why can't I find yamaha 2003 150 outdoor motor fuse REPLACEMENT anywhere????
Hello, i have the same problem on 1998 yamaha 200 saltwater series, wont pass 2000 revs on load in neutral it does. Compression is good 115 to 120 on all 6, spark on al 6 but two cylinders aren’t working i got spark but the plugs are washed just like the one u showed. What else could it be, pumps are good not leaking. Thanks would really appreciate some advice thanks
Same problem on my 150 yamaha! Did you find the problem? And what was it if so???
i have an old yamaha 28 hp 2 stroke (has the same fuel pump) it has a problem sometimes if i hit full throttle it revs up to 2000 rpm and after a few seconds it just gets up to top speed. haven't checked the carb jet but could it be the fuel pump? (by the way english is my second language so sorry for the bad grammer and all)
Dude thank you!!!
you just got a new rev limiter for the kids
Lmao swap the bad one in when the kid asks to take the boat out
Ya avto accelerate with the linkage arm which advanced ya timing
Can that allso make the motor run blue smoke all the time the motor runs. It has auto oil feed to mix the oil and gas? It just started last two times I went out. The motor never over heated
I would remove the oil injection. Block it off and premix the fuel your self at 50:1 ratio...One pint to six gallons of fuel or 16oz of TCW3 Marine Outboard Oil...
Two strokes smoke you want the blue smoke just not to much of it... Sounds like you need a new oil pump for your motor or looked at if you are having an over oiling problem...
Do you know what the compression should be on that engine. I have same but not sure. I have 72 psi on all 3 cylinders. Not sure if that's ok or not
That's a little low 120psi would ideal but as long as the numbers are the same that's a good thing. May check and replace the head gasket could have a leak also would be a great time to inspect the bores. Can also follow me on my outboard page on FB
facebook.com/groups/203346153363750/
On my 6 cylinder yamaha I have 3 low pressure fuel pumps. It's a 2 stroke. I pulled 2 plugs that weren't getting spark and on the plugs it was straight gas no oil. But other plugs there were oil. Can that be a cracked fuel pump leaking acces gas in the cylinder? If so having 6 cylinders and 3 fuel pumps. Does one fuel pump do 2 cylinders then?
Thanks
ths is a fix for some idle but want rev up if you have remote fuel tank with hose conn each end they have a tiny o-ring on the female plug it gets a hole init from ee lots of use take afish hook hook it and pullit out replace both o-rings this hole lets eng suck air instead of fuel you can buy these small o- rings at boat shops
All my husband wants to do is see a video on HOW TO REPLACE the yamaha 2003 150 outdoor motor main fuse
How to change a water pump on a 1997 Johnson 90 hp boat motor
I have a forcé 150 I change the fuel pump and when I turn it on it starts accelerating by its self from 0 to 60 any clue what it could be?
Can this be the problem with a Yamaha 30 hp 3 cylinder 2000 mod. The carbs have been cleaned, all three plugs have spark and the compression is good on all the cylinders. But it won’t rev clean. Would mean a lot if anyone could answer! Thanks
Thanks for the video ! What is the plug gap for this engine?
about .32 I think not sure without looking into the factory manual for the specs.
Having some trouble with a 2007 50hp 2 stroke Yamaha. Oil injected. Sat for a while. Cleaned carbs. Checked spark. Would idle decent, but wouldn't rev up. Realized the oil pump wasnt working. Deleted the oil pump and used mix gas instead. Now no fire to #1 cylinder. Any ideas? Could it be the coil for the #1? I was getting fire initially. Could the diaphragm be bad and flood out #1? Runs on 2 and 3...
What was ur issue and how did u delete the oiler
Was it a kit or what
I've seen and had a faulty squeeze bulb make my 2005 90hp a 2 cyl also.
I have a 90 up two stroke the oil feeder taken off I mix it my self now seems to run great to about three quarter revs and then when I knock it onto full revs it cuts out engine after a few seconds it will start again after but struggling to think what it is
Start with the basics run a compression test followed by a spark test with a spark gap tester set at 1/4" you should see a nice blue fire. It could be a number of things from high speed jet clogged or even the stator breaking down that feeds the CDI.
@@WAH420 thanks I’ll start with the carbs
Did u remove oil system yourself is it a kit or just removal
I wish I could find video or article on it
I just bought a blue wave with a 1998 Yamaha 90horsepower 2stroke well the middle cylinder had 0 compression. The ppl I bought it from put seafoam in it and put it on the water for about 45 mins and they said that at first it was half power but then that second piston would get power and it would run good for a few mins then stop . It did it a few times before they took it out of the water. What do you think that could be?
O compression is no good! start by pulling the head and have a look. Could be a bad head gasket or needs a rebuild. Check out my outboard page on Facebook
facebook.com/groups/203346153363750/
Mine, idles ok,
But shakes and chokes when I accelerate.
Cleaned out carbies and jets, replaced coils and spark plugs, old stator, fuel pump too but still doing it. Do you have any other ideas of what it could be .?
Oil level sensor, Maybe Faulty try unplugging the pink wire from CDI power pack or in the wire harness or loom...
Wanted to Add: If This Don't Fix The Limp Mode Sound and Still Won't
Rev-Up!... Check or Unplug the Oil Sensor on the Oil Reserve Tank it
maybe Faulty...
Hope that helps
wah420 thanks for that, i will give that a try. If it works what part should I replace to fix it?
If Oil Injected! The Oil Sensor on the Oil Reserve Tank would be bad.
Daniel Duy Nguyen same problem im having
wah420 my yamaha 70 hp 2 stroke runs well but sometimes when i give it full throttle when on the water it wont rev all the way up to 6000 - 7000 rpm it will only be hitting around 4000 rpm at full throttle ?? but this is only sometimes ?
i havent looked at the carbys but i have changed the spark plugs ?
what do you think it may be ?
thanks
My 85 Yamaha runs great in a drum of water but will not start when I put it in the water at the boat ramp plz someone explain this to me
Go to my Outboard Page for help!
facebook.com/groups/203346153363750/
Thanks, B
the way you explained it, it could be low compression on some cylinders. the water creates too much backpressure against the exhaust, and with low compression the engine won't idle. i have seen this on a few engines. corrosion killed those engines.
Mine is flooding number 1. Could be the same problem??
I just replaced my fuel diaphragm last week and my 115 Yamaha is still cutting out..
would this make an engine dump unburned fuel and oil into the water?
Yes...the fuel/oil mix has to go somewhere if it's not going into the engine.....
I hope this is my problem by boat is bad luck every time I take it out shit happens to it like this I'm ready to drive it into the middle of the lake and pull the plug .
have u guys ever fixed a 85hp yamaha out board
My 2 stroke dirtbike is doing this... Has no fuel pump. Any advice
I would check the high speed jet in the carb.
Where do I find this connector?
My Yama travels at top speed and dies suddenly. The middle carb isn't revving up to the max. It's clean. Can u help please
I would run a compression check and Spark Test on the Cylinders... Check and make sure you have good Fuel and the fuel pump is working to supply your motor with gas at full throttle... I would Suggest a Fuel / Water Separator if you don't have one...
You Can also find me on my FB Group Page... facebook.com/groups/203346153363750/
Hi would like to ask you if you can please help me out I have the same problem on a Mercury M2 V6 jet engine a guy told me that it is like an outboard head just that it is installed on a jet section
To start with I removed the carbs cleaned them and reinstalled it worked fine when started up then it came like before..... that is when I rev the engine it goes to 4000 revs maximum and make the sound exactly like your video can you please help me cause its driving me crazy. Thanks in Advance Mario
I need engine boat 15hp used for haiti.
Maybe somebody can help me here I put a new trim pump on a 90 ho 2 stroke and when I push the button to go down it goes up and when I push the button to go up dosent do anything thanks guys
Rony Morales try changing the solenoids over there’s a chance one has went. If it work then that’s your answer. There should be three cables blue is up green is down (green grass blue sky) and a ground. Swap them around. I have found that the Yamaha part was £160 but managed to get one from car electric place for £15 that some the same job two seasons now. Hope his helps.
Fuel Pump(s)
reeve valve