Rebuilding a supercharged Mini Jet-Boat. night and day difference.
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- Опубликовано: 4 май 2024
- We dive into the massive list of problems with my newly acquired 11' aluminum hull mini jetboat with a supercharged 255hp sea doo engine. Then we test it on the water to see if we did good. or not...
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Definitely need to tow the mini boat with the Miata. At least for a thumbnail.
Make the hole in the outlet from the exhaust smaller to give the water more time to fill the cavity around the exhaust. I have never seen a engine water outlet on a boat just run out through a big hole. It is always a smaller hole that sprays the water in a thin stream. If the water do not fill the cavity completely the exhaust is going to get hot around the sensor. That is why the rubber pipe also gets hot.Hope you understand my sloppy english. English is not my first language. Keep up the good work.
I was thinking something similar. Maybe there isn't enough back pressure to force enough flow into the exhaust.
This right here gets my vote as well..
I'd also look at getting a restrictor on the engine side so that the water doesn't just travel the path of least resistance.
@@MrGlider_ I think that's why the cooling water was tied back together before going out of the hull.
This. You are getting air / exhaust gases in the exhaust and that's setting off the sensor. It's either cavitation and you aren't getting enough water in or it's being allowed to get out too easily.
Could possibly use a ball valve on the exit line as well
Just my opinion. Don't narrow the axle on the trailer. Just extend the fenders to cover the tires. Those small trailers pull so much better with a wider axle.
Also, opinion #2. A cooler in the driver side of the engine bay would be cool. Fab a nice aluminum heatshield for it. Having a cooler back there with lunch and cold drinks would be awesome.
Yep, Definitely don't shorten the axle. Not only will it pull better but some of those narrow jetski trailers can be prone to tipping if you hit a curb making a turn because someone cut you off. I'm Speaking from experience, luckily the fender hit the curb and kept the jetski from hitting the ground and getting any damage. You wouldn't get so lucky with that wider boat.
100% If you narrow the axle it can be prone to fishtailing, and it really does not help with anything besides parking it.
My only reasoning is since the leaf spring point is so far inboard you can see the axle starting to bend and camber.
@@Taylordrifts
Important observation.
With the potential mods you are considering, adjusting the axle is probably the wise choice for proper support and structure stability.
Yes, the wider track would be ideal, but I'm guessing that is a bit light weight for your boat.🤙
@@Taylordrifts I would reinforce the axle. I built an offroad trailer for my ATV'S and had to move the leaf springs in because of the deeper back spacing so I reinforce them. Have had over 1500lb in it with no problem. I'm a decent fabricator and you're better than me 😆 Or buy the same width just a heavier axle. Or better yet buy a better trailer, that's what I did to keep my jetski from tipping again. Good luck
Overheating issue is a pretty easy diag: when you're full throttle, the exhaust gases are moving faster than the water supplied to cool it whereas when you're just putting around, there is enough volume/pressure of water to keep the exhaust cool. When the temp alarm goes off, it's because your sensor is reading the exhaust gas temp until that chamber fills back up with water enough to cool that sensor down. You may have an issue with not enough water volume/pressure or both. Verify your water pump is working correctly, otherwise, you may need to redesign the exhaust cooling chamber to give the water a chance to cool the exhaust.
It seems like the inlet is too small or exit too large.
@@thewitt76exit is to large
is there a water pump? Hamilton jet feeds water from jet unit itself. are these different?
I WAS THINKING THE SAME THING with one other possible issue
at full throttle it could cause a pressure issue with the water being fed from the jet pump you might need to restrict the water outlet
Riva sells different washers for your pump water inlet that are on your pump adapter I run the green one on mine.
You should just build a "swim platform extension" to deal with that water splashing while in reverse. Fun project and adding real estate. Seems like a win-win from my house.
I love the “from my house” part. Lol such a great way to put it. But you’re right. That’s a great idea!
Taylor has the miata of the mini jet boats and I love it. 🤣
On the exhaust manifold there are two 90 degree elbows one on top and one on bottom they have restrictors in them make sure there not clogged. I own a jet ski shop in south Texas coastal performance
I think the ability to work on an engine is amazing! How you guy's understand the way they work is beyond my tiny little brain!
I think you need a restriction on your water outlet. This will allow the water pump to build pressure and force more water into the exhaust system. To add restriction, you need to tee the water outlets back together so they have the same outlet restriction and would maintain balanced flow.
No you don't
I would have them on the same outlet as well, but I don't think they need a 1" outlet either. I'd try different outlet sizes to get some more pressure in the system, 100% sure he's getting air in the water-cooling system.
I want this lil guy! As Always, May God Bless you and yours! 😇
The best way to wrap up a weekend is with a T-Ray video!
You know what I like about you bro. You dont muck around with a long intro. You get straight into it. You dont muck around in the workshop, you change the steering wheel and fix things like its no big task. Everyone else makes simple jobs like theyre so hard to do. You just do it
Well I can certainly see why he wanted to get rid of that boat, it must have been no end of trouble the way it was.
Probably but also looks like they did a ton of bandaid fixes trying to figure it out which makes it a pain to diagnose.
Dude probably ran out of talent. This is a complicated swap and project in general. Luckily for Taylor he's very mechanically inclined and willing to go further then just about anyone to figure something out.
That’s performance boats. All of them..
Remember this engine was not designed for open loop cooling. The exhaust and the engine were cooled differently. The engine was coolant and the exhaust and intercooler were cooled from lake water, well now you are throwing in cooling the engine from the lake water now so the water routing has to be changed for open loop cooling. Look up the way riva wants the open loop cooling done the restrictors in the pump Change when you do open loop cooling so make sure that’s correct also. The problem is a very simple one once you figure out how to get the correct flow to the exhaust. If need be you can tap the pump and do dual cooling so the engine and intercooler can be from one water inlet on the pump and the exhaust can be from the other water inlet on the pump. Remember if you overheat the exhaust it can melt the rubber exhaust hose and sink the boat quickly I have seen this happen to many pwc’s mainly seadoo’s. Good luck Taylor keep up the great content.
15 min in: doing most of your stuff by yourself is part of being a car guy and the reason why we love your videos. That being said: its cool to see you work with others who know their craft to steepen your learning curve. Plus its always great to have a reason to hang around with friends 😊
The poke on the tires isnt bad honestly. Might be a fun fab project to build some fenders you can stand on to fit the current width.
It looks like your reverse bucket (when down) will shoot water out the top of the bucket instead of shooting the water down under the boat. Try looking in to adding a rubber flap or flexible guard to the top of the bucket to the pump housing. It will stop the spray upwards! Cheers!
First time ever seeing Taylor realign on another shop for 1 of his projects 🙃👏🏻👏🏻👌
A smart person surrounds himself with smarter people than he is for any particular projects. In turn, you become smarter Faster..
Nothing better than finding a great shop to teach you the ropes and help get a project dialed in. It inspires so much more confidence and gets you out having fun ASAP. To fellow mechanical nerds, support local shops and never be afraid to ask for some adult supervision (its cheaper than you think most times too)
Tayler Ray is gonna build a bigger boat 😂😂😂
Yup, I see it in the future....he's gonna get this one right and sell it. Than he'll go buy , or he'll build one like.his.buddies that.helped him straighten this one out!
Love how you use the dually to tow the little thing
“Shortcuts lead to long delays” is true with cars but especially with boats!!
Don’t bypass the sand trap it’s very necessary even backing off the beach. Get the bucket fixed/ re engineered for your boat asap, not having reverse could put you in a dangerous position.
With a boat your just learning I’d keep the extra bilge pump!
Lastly, trim in boating is crucial!!
I understand you are just testing and live 5 min from the water but before you go through a thorough test or go any distance, make sure you have all the tools you can at your disposal! Boating can get very dangerous very quick.
Love the videos Taylor keep up the great work!!
He doesn’t miss! Loving the variety lately.
I enjoy bouncing around on projects! Mentally it’s tough to keep track of so many drastically different things. But it’s keeps it fun for me.
You the man Taylor. This series was a great surprise !
I would check all the connections in that water system! Just because it’s not leaking water out, it could be sucking air in causing a similar cavitation. So under low load, no problem, but under heavy load it causes low flow allowing pockets of hot exhaust to trip your sensor.
Love the long format Taylor 🤘
Thanks for all the content you bring us.
1. Right side brake light out.
2.air filter??? Never been out on a dusty lake.
3. Check the pump for the water temp problem. You may have high speed cavitation at the fitting. Or needs a check valve on the exhaust fitting to not suck watered out the manifold.
Salt and debris still build up inside the engine bay on boats, opening and closing to service, adjust, and mess with anything in there can also collect debris too specifically on jet boats. Air filters + the nano mesh to expel water = confirmed clean air in the engine all the time. Not sure why one wouldn't run one. Even a car with a fully sealed air box, you remove the filter, you're still getting shit in the engine.
I'm with Taylor on just getting out there on the water and working through things is enjoyable and satisfying and I'm sure he'll figure it out. My 1 cent worth - Could be that the sensor placement in the resonator box is such that once it gets up to full pressure the sensor gets exposed more to superheated water vapor & steam rather than a more solid flow. (maybe not enough back-pressure?) Might have to pull off the rear deck lid to do this...but you could get a small section of clear tubing and a coupler to temporarily mate to the black exhaust tube going into the resonator box for some visual flow analysis while under full load, too bad you can't see thru the box though.
Test the compression. It seems like it could be a head gasket or a crack in the cylinder wall or head. Considering that the water is not in a sealed system and is replaced with cool water in cycle it could be compression superheating the water under full throttle (higher pressure) which would make it cool down fast under low throttle (lower pressure). Just a thought. Kinda worst case scenario, but maybe worth considering.
You wasn't even close to being right lol.
If that was the case the engine would be running very shitty and he would ultimately end up with a ton of misfires and obvious signs off the rip and this entire video would've started very differently and ended very differently.
I think the water pump is worn out
bzzzzzzzzzzz wrong lol
Man I’m loving these videos! Can’t wait to see this thing caged with a windshield and sound system!
I love this man’s videos, but I also love the comment section. Feels likes a man showing us some dope projects and there’s always people that have there input that you can tell know there shit. It’s just a great vibe all around🤘🏼
Your reverse bucket problem is it’s adjusted too low, you just need to adjust its range of motion so it doesn’t go down as far/rests higher in the forward position. If you look at the deflection angle of the bucket when in the reverse position it’s angled where it will kick water up. Also you can see your forward/reverse lever jerk down a bit every time you hit the throttle hard, this is from the top of the jet thrust catching the lower lip of the bucket when in Forward.
digging the boat content
Great job man!!
Ayy more jet boat content 🤘🏻🤘🏻 killin It!
I love when car guys do boat stuff…. Endless laughs for me…
Love your edits dude, doesn't matter what it's about I am all for it.
Automatic like for jet boat content 👍🏻
Such a cool boat! Shows your skill level how well you were able to sort out these issues. It seems like the water pump might not be flowing enough. Judging by the wear on the carbon seal it's possible the pump is bad too.
You’ll be very glad you were able to get the electric trim working. It gives you more options with that type of boat.
Might need to make the water exits a bit smaller the water pump may not be able to flow enough water to fill the system without air pockets.....are you sure water isnt being shot out of the top of the bucket when in "reverse" in turn splashing you with water?
Damn it’s almost like we told you multiple times that the trim was a big issue.
U sound like a little fucking girl anyone ever tell u that?
Drifting cars wasn't enough for Taylor, so now he's drifting boats. Next thing you know he'll be drifting his bus...
The original seadoo had a closed cooling system for the engine. And the exhaust used the jet pump water to cool it . The engine was cooled by circulated through a ride plate between the jet pump intake and rideplate. Engine runs coolant and exhaust runs raw water.
Hell yea brother, needed a good show to watch before i watch the formula 1 race!
Right brake light on the trailer!!!!😉
Safety vest would probably be a great idea.... ya know? just in case.
Safety vest and SEATBELT!
@@roberta4989 It's slower than the stock ski the engine was in by a lot, and you don't get seatbelts on a jet ski. I don't get people who are obsessed with seatbelts for everything.
@@AceEverett sometimes it's better to be thrown clear. somewhat joking, not really though lol
@@basementbanter366 Only gonna get thrown if you hit something solid at full speed, and that's just driver error of not paying attention in a watercraft. Seatbelt fascists just need to use common sense. What else aren't there seatbelts on? Boats, side by sides, motorcycles, dirt bikes.
And if people knew the laws, they'd stop nannying about PFDs on a boat too. You don't need to wear a PFD on a boat as an adult, you just have to have one available for every person in the craft. I don't like to see people being complete dumbasses, but going way overboard on safety is for boring people.
@@AceEverett I don't get people that have never seen a person injured by being tossed around in or from a boat. I don't get people that think you get less hurt by not wearing seatbelts.
Great content thanks for sharing
I liked that green truck still grandmas car brother and heck yeah love to see it built up soon
Hey Taylor have you ever seen a copper spatula for welding holes? I think it would’ve helped with your plate you welded on instead of welding a new plate the weld doesn’t stick to the copper on the back side so you just basically fill the hole flush with weld, love the boat, love all the videos keep em up 👍🏽
That’s a big hole for that. It would work but it would be 10x to have just did what he did.
Dude as fast as that thing goes, put your vest on. We want you to continue making cool stuff and not get hurt. God bless
The issue with the water spraying up on reverse seems like it may be coming up out of the top of the bucket and nothing to do with the horns themselves. When you plugged the holes it was worse because it had no where else to go. Just a theory from my observation because it seems like the bucket might be going too far down. 🤷♂️
Dang these jet boat adventures are cool! Makes me want a boat so bad 😂
I had a similar over temp problem with one of my jet skis... I had the computer flashed and didn't have have the problem again. The tech couldn't say why and was at a loss, but it fixed it.
Hey man,
I'm loving the jet boat videos.
There certainly is a lot more to these than I ever thought.
Q. Have you got a link to your sunglasses.
So thanks for sharing man ✌️ Peace from Melbourne Australia
good video , thanks
Test your temperature sending unit/sensor.....
Bring a multimeter with you on the boat. When the hi-temp alarm goes off, immediately unplug the sensor and ohm the terminals out. There are 2 types of temp sensors, one that measures an actual range of temps, and one that simply closes when it reaches it's preset temperature. If the terminals show a dead short when the alarm goes off, it's the type that simply closes a switch when it reaches it's set temperature. If you find a certain resistance whwn you ohm it out, then it generally reads a range of temps. Note the resistance reading when it's hot.
Now take the sensor out and rig a piece of stiff wire, or whatever, to hold the tip of the sensor into a pot of water on your stove. Put a thermometer into the pot, hook up your multimeter to read the resistance, and slowly bring the temperature of the water up and keep an eye on your meter. Once your meter suddenly shows zero ohms from infinity, OR the resistance slowly changes and reaches the reading that you took on the boat when the hot light came on, read the thermometer in the pot. That is where the temp actually was when the sensor tripped the hot light/alarm.
I have found temp sensors quite a few times on automotive engines that were WAY off of what they should have been, and for whatever reason, they ALWAYS seem to read much higher than the actual temp when they fail. My EFI drag car has had the sensor fail twice in 3 years, and when it starts to idle shitty because the sensor is reporting the wromg engine temps, I KNOW it's time for a new one. BOTH times that one failed, they both read approx 90° higher than the actual coolant temp. Strange failure mode that they both ended up failing by about 90°, but it is what it is.
Check your sensor, it very well could be bad.
I kept thinking the video was about to end "with that being said" lol it was nice having a long video 😅
Not sure if this has been mentioned yet, but when you re-wrap the boat. Have the registration numbers read as such: FL 7462 TS. Spaces between the numbers and letters... This coming from a guy whos had a skiff for almost a decade with my numbers and letters bunched together and no ones batted an eye... But the correct way is with spaces... and i know how you are with being by the book. cool video as ushhh broseph.
Coming from background of the old standup jetskis, I think your water exit is way too big. On skis they always have small outlets that actually spray the water out. Sometimes we maximize performance by putting restrictors in the exhaust to let them build more pressure in the exhaust for higher speeds. Other comments saying you are likely getting a hot reading due to water not being in the exhaust are correct i think. Shrink the size let it build pressure, if it gets too hot it will steam out of the pisser (that's what they're called in ski terms). Also, my vote is to keep the exhaust and engine cooling exits separate!!!! This allows you to rule out waterline clogs by which one is spraying out or if it isn't spraying enough. Good luck!
Man that thing RIIIIIPS!!!
Hey, Taylor. I haven't gone through the comments, so I don't know if this has been suggested, but try adjusting the reverse bucket down. The water should hit at the top of the bucket, when it exits the jet. This will keep it from shooting over the top of the bucket; all or most of the water jet will leave the bucket at the bottom, keeping you from taking a shower 😂
I saw this on market place glad I didn’t buy it, I didn’t have the money for it anyway thank you for taking one for the team
Just build a splash guard for the reverse spray
I wonder if the fresh water inlet off the jet drive was messed with. A minor diameter change with hoses that small make a huge difference in pressure/flow. Sensor orientation matters too, make sure the thing is the right way around.
You pissed that fisherman off for sure.... 9:24 Long gone by 10:35
🤘😎👍
Sick, it's like the Miata edition.
When you parse out what you really want, you can build the Vette version. 🤙
If I was this guy I've always dreamed of having a boat engine like that of Burt Reynolds as Gator Mcklusky and that Awesome Jet / Rocket. I've looked and looked for something like that and can't find it. I found a boat just like the one used. Nothing looks more Boss than 2 long water jets shooting out like it did in the movie
Had a similar issue on my seadoo and would only throw the exhaust temp alarm when going full throttle. Did some work and nothing. Took it to the marina and sure enough jetpump housing was cracked causing the cavitation.
Again, someone instantly mentions trim. I respect you Taylor and I myself have no idea admittedly, but if everyone is telling you trim is an issue maybe you should fix that 🤷🏻♂️ I know you’ll get her dialed tho. Fun to see some different content.
I’d be wearing a life jacket of some kind. They make nice looking ones.
i bought a seadoo spark one time that sitting for quite some time and when i test rode it, it was acting the same exact way. but after 20 minutes of ripping it hard it cleared up and never came back. swapped plugs once i got it home and never had another issue.
Look into the Jetski this motor came out of and see what exhaust hoses it used. Put the sensor in a different spot so it always has water going over it. Install a temp gage instead of that warning beeper.
That's the boat Kyle Wade has...the 4 seater I mean
Can’t wait for the livery change😂
That patch on the hull… a square you fitted the bull horns with circles.
i think it would be sweet to lenghten the trailer tongue, better for multiple reasons. Also add a small 3_4 inch plexi deflector to the top of the aluminum "window" would hepl alot with spray and wind
i actually like your small boat design, Smaller faster,nimble,
Killer video as always man! All of your stuff is just top notch with the details. How do you like that ct150 injector bench? I’ve seen you use it in a couple of videos now and I think that would really come in handy to have one around
AWESOME
25:10 I would put wider fenders on it. Having the wider axel adds a bit of protection for the boat when trailering.
That band saw every time you use it scares the shit out of me
now I'm starting to like this thing, all the trouble shooting is interesting to me.
Maybe try to run them all in series so that they will all receive the same flow rate. Just prioritize which needs coldest water first. Probably charge cooler > engine > exhaust
You need to figure out the trim problem. Trim is super important.
Agreed, trim is super important. You can't just leave it trimmed down or up, you are missing out on the benefits of adjustable trim like getting out of the hole fast and top speed
I did. It’s fixed. As I explained in the video.
Put a shut off valve going into the engine, adjust it were it is flowing just enough to keep it at temp,the rest goes to the exhaust.
Thanks for the efforts!!
In my opinion your reverse bucket spray issue is caused by the bucket being spaced 3” or so behind the tip of the nozzle. That allows thrust to be directed vertically. If you look at the design of a Hamilton Jet or Ultra Jet buckets, there is no gap from the visible from the top when in the reverse position.
Jesus Taylor……. What a lil ripper that “Mich Light” is………happy boating……⚓️⚓️⚓️⚓️⚓️⚓️⚓️⚓️⚓️⚓️⚓️⚓️⚓️ ⚓️⚓️⚓️⚓️safety gear…..🛟🛟🛟🛟🛟🛟🛟🛟
Try restricting the exit before the through hull. Maybe the waters flowing through the exhaust too fast. I know on skis the water exits are quite small
If you can find a standard ski that your motor came out of measure the outlets. They are that size for a reason. If after changing yours to the correct size your still having issues put a ball valve inline after the split to the oil cooler you can then throttle the water flow to send more or less to the exhaust.
Wasnt that boat on a Cleatus video about a year or so ago, I think it was a meet-up going up the river.
Check head gasket man.. could be getting exhaust gases into your cooling system while wot and under boost. Just something to consider.
When u rerouted exhaust u took it out of the loop correct so it isn’t getting pumped just kinda flowing? Try throwing a electric water pump on it and see if it’ll help
whats the chances that exhaust gasses are making there way through what im assuming is a water jacket and hitting the temp sensor, small crack or something? would explain the steam from the exhaust (pressure in the coolant system is higher than exhaust) then when your giving it some power the exhaust pressure increases putting hot gas in the cooling system.
I'm not sure on the 4 stroke ski motors, but the 2 stroke jetski's spray a small amount of water into the exhaust gasses to keep the exhaust cooler. This could be blocked up and not spraying much if any water into the exhaust.
Make sure you aren’t using the factory restrictor washer. Either drill it out or replace with a standard o-ring. I’m going to assume this is a 2017 engine since they are most likely to have this issue. The washer is located between the jet pump and the pump adapter ring on the transom.
Also check jet pump filter plastic nut on side of the pump
Adjust the reverse bucket where it doesn't go down so far. Looks like it's just blowing past the top.