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Old June 13th, 2008, 09:53 PM   #1
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Default Kawasaki 550 crank seal question

So i just got a 1990 Kawasaki 550 stand up jet ski from an uncle of mine for free and he said the motor was good but it might not hurt to rebuild it since it has been sitting for a couple years. I have the motor completely apart and have rebuilt everything on the top end and now im trying to replace the crank seals. I can get to the one seal on the side where the flywheel connects to but i can't seem to figue out how to get to the middle one to replace the o-rings and i can't get to the ones on the output side because there is a big output gear on that side. Does anyone know how i get to these two places? I may be able to get to the o-rings in the middle by sliding them over the crank to the middle but the seals on the output side i just can't figure out how to get to.
any help would be great becasue im hoping to get it running for next week. Also if anyone has a used starter for one of these that they would want to seel let me know becasue i need a new one.
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Old June 13th, 2008, 11:47 PM   #2
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I wish I still had my service manual, but I tried looking for it last week and I think it's history.

Myself, I wouldn't have touched the crank seals. But that's me. A quick visual for sure though. Sounds like you're being thorough, but you could have just checked the compression and if it checked out, left it alone for now. I picked up a 650 in 2001 that had set in a barn for 10 years. It was prepped right before it was put up, and there were zero problems with it. As long as you fog them every fall and keep the water out, they're good for a long time.

On buykawasaki.com, they have parts diagrams. I've used them in the past when I ran into something that stumped me, but that was always on a 650 or 750. They are all similar though.

There's a guy on eBay, his name is Gordy30 (I think) that deals in tons of old Kawasaki parts. He's real knowledgable and very reasonable. He actually bought out all of PJS's remaining stock and has been steadily selling that stuff off for years.

Since you have the flywheel and cover off, replace the bendix while you are in there. If the oil injection is still there, ditch it and get a block off plate. Premix is the way to go.
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Last edited by Fatty Matty; June 13th, 2008 at 11:51 PM.
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Old June 15th, 2008, 12:34 AM   #3
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stop where you are and put it together if the seals on there are ok. that ia a multi piece crank that is pressed together and needs a special jig for reassembly to clock it right. if they are ok/useable then run it, if not then buy a rebuilt crank.

i agree with matty git rid of the oil injection. they are known to be inaccurate and cause lean problems. also bilge pump will be nice if your new to riding so you dont sink the ski, ive done it and it sucks hard kore.

have fun they are a blast.
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Old June 15th, 2008, 11:39 AM   #4
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don't mess with the middle ones...the 440's and 550's are famous for the flywheel side going bad...
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