Jet Ski Engine Rebuild
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- เผยแพร่เมื่อ 9 พ.ค. 2014
- I rebuilt a 2 stroke 650cc Kawasaki jet ski engine. I replaced all the piston rings, gaskets, seals and got all the rest of the electronics and stuff. That stupid set of studs gave me soooo much trouble. I tried everything, heat, hammer, welded nuts on and turned em, pb blaster, bottle jacks, tiged the darn things, everything! it took a couple days but I got it.
The compression is 165/161psi and it idles somewhere around 2k rpm. With a waterbox its pretty quiet and keeps cool. I got everything off ebay separately over a couple weeks for pretty cheap.
It's for an upcoming project that involves water and "flying" - วิทยาศาสตร์และเทคโนโลยี
Damn, you were really dedicated on the block for sure. Great job man!
I just rebuilt my 650sx just like you did, and had just as much trouble getting the cylinder offhearing that engine fire for the first time makes it all worth it
Great video and very good job . Next so look forward to new projects , greetings from Bavaria .
Dude, awesome build and even better editing, loved it!!!
all of that in 2 minutes, darn, you're good
Looks like just opening it, cleaning it and putting it back. Engineer's have designed it so well that it doesn't need much repair to do 👌
Most 2 stroke engines last forever... as long as they weren't overheated and/or ran without oil/premix.
Awesome video
Very nice video. And very nicely edited!
Amazing work man!!
And I dont say that to often.
Interesting art right there
Nice Work, You make it look easy, Im about to start on my 750cc version of the same engine,
Good job bro
pro tip put two of the nuts on the stud and run the bottom nut until its stops on the top nut then you can use that as a stud remover
LOL when you brought out the lifts
taking the cylinder off was easy....lol....thanks for the vid,about to do the same with a few off my 650's
great job
Nice benn😊
Ben, You hit 900 Subs. i would reckon 10 days to a month than. You sky rocket to a million
I love it! #thumbsup
dude i love my jet ski engine. I'm just learning now how to wrench on them because I somehow over heated the head...melted the paint... now I'm diving in and this is one of the best videos. I don't know what kind of "flying water toy" your making, but I'm all in for trying it when you build it. Thanks for the video...ebay has most the parts???
Wow. I'm doing this job now. One of my pistons cracked (I didn't do it) and lost compression. Light scuffing to cylinder wall but should hone out. I'll just put in a new piston and rings for that cylinder. But it was fairly easy to separate the block. I tapped it with a heavy rubber sledge around in circles and I was able to lift it right off
simple but cool !
very nice! i have an x2 and a 750sx engine that i have just turn into parts! have orderd the gasket set in order to rebuild it and put it into my x2! i have never done it before so i could use any tip and advise that you can provide! Also when i took out the engine from the sx i had some kind of a problem that i couldent find what it was... The engine was starting but immediatly terning off after a second. The carb is ok, the compression was good and the electronic plaquet was showing power. any idea of what it could be? thenx
my regards!
super cool
Awesome
Thanks man great job how much did you spent to rebuild that engine please thanks
Nicely made video! Only suggestion that I have is to give Kroil a try, works so much better than PB blaster. Although with the price, I save it for the really stubborn stuff like you dealt with in this rebuild!
thanks!
Looks like a simple engine.
I think I need to replace the crank seals on a '92 750SS (looks like the same motor), the package gave me 3 seals but I only know of two on either side of the crank, do you know where the 3rd one goes? Is it worth removing the lower crank cover (oil pan??)? Great video by the way, most people post hour long videos showing every detail and its way too long to watch, this is great summary.
Now you can rebuild your rx8s engine 😉
Nice rx8
I want to do this myself. Would love detailed videos
how much brake horsepower can it produce?
I want to make a 2 stroke mini jeep
So are these motors water cooled or air cooled?
Water cooled it comes in through the jet pump and out a pisser on the side of the ski
is it normal for the crank bearings to sound like that when your turning the crank?
I have a 650 motor that sounds just like when I turn the crank quickly, I thought maybe the crank bearing were bad because they're a little noisy. how do you judge if they are still good or not?
That's a pretty normal sounding crank.
I'm rebuilding a Kawasaki JH750 and doing a CRAZY AMOUNT OF PORTING AND MODS, you should check it out! Great build by the way. :D
Sharing a single expansion chamber for 2 cylinders noice
My brother got the same motor and put it into a JS 550
I have the same engine but with missing nuts etc. Is it possible to put the engine on a go kart or something with the cooling system? Because I see a lot of water coming out of the exhaust...
Aris Vezos you need good cooling and a transmission
yea you'll need to have a good water cooling system.jet ski engines have a wet exhaust, which really wont work on a go cart so you'd need to find some other suitable exhaust (pretty hard to size for a 2 stroke) or put a jacket AROUND it and make a water cooled exhaust (a jet ski exhaust might get too hot, not rated for air cooled temps)
How did you split the crank cases?
Look it up how a shop dose it or you will break it.
Next time you have one totally corroded and stuck together, put the whole engine in your oven on 300° for about 6 hours and it will come apart nice and easy
Awesome, how do you know which plug wire goes where? I lost positions...and there's no markings I figured front one off coil front cylinder...was told don't matter appreciate help thank
tony Baron factory service manual
It doesn't matter you can put either one on either side.
I know almost everything about car motors but I’ve never known that jet skis have pistons
did you replace the crankshaft? Sounded pretty bad.
I did not, that bad sound is the squeaky foam its sitting on
I need to learn to do this so I can snag a cheaper one than running with 150+ hrs for 6 k lmao
Nice work! So its a jet ski motor? Was it hard to get the manual for it? Or are you one of those clever mechanics that doesn't need one?
No manual, The torque settings were cast right into the block! Google did help a little tho...
You made it look very easy! Can't wait to see what you have planned for it.
Not sure if you’re still active on TH-cam, but I pulled my motor and would love some advice if you’d be willing to help!
Hey man please respond I’m buying a 25 dollor 1988 jet skii that needs engine rebuilt is that all I haft to do to fix it or a lot more
No clue you'll need to take it apart to find out!
how did you get the pistons in?
Ted Soloman you take the Pistons off of the connecting rod, compress the rings and push it in from the top of the cylinder so it's sticking out the bottom and attach the connecting rod back to the piston.
Way too complicated. Its easy to just compress it by hand as you slide the head on. Make sure one of the pistons is really close to TDC when you do it.
Hello!
I watched your video on TH-cam. You have a great understanding of engines! Can I ask you to send me by email instructions for repairing the kawasaki js 550 sx engine. Thank you!
How many hp
would a four stroke, one cylinder engine work?
sure?
lol
Should slap you for even saying that.
Can you do my rebuild lol
Y este que hizo bueno desarmó y armó pero que explico
looks like fun! (not!)
Nice rx8
Nice rx8
its my moms