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  #1  
Old 01-20-2013, 06:58 PM
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EARTH5 EARTH5 is offline
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Kawasaki 23 hp fh-680 v problem

I gave my laser z hp engine to a friend to rebuild. It's a Kawasaki fh680 v 23 hp. Well he is a professional motorcycle mechanic and took the entire engine apart and started making a parts list which I ordered all except what he called crank or main bearings.
I looked online and figured out that they don't have a main bearing on crankshaft instead a sleeve that fits in the cases and the crank rides on that.
So my problem remains he removed only one of these ( thank god) and Kawasaki doesn't offer it as a separate part. They want you to buy the entire case for $450.
Does anyone know where I can find that sleeve/ bearing or any other help or solutions would be greatly appreciated. Thanks
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  #2  
Old 01-21-2013, 09:31 AM
pugs pugs is online now
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There was a post on this a while back. I forget what the outcome ended up being but try doing a search in this particular forum(Mechanic and Repair).

Honestly if those are in need of replacing its time for a new engine.
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  #3  
Old 01-21-2013, 12:11 PM
laman laman is online now
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how many hours on this engine?
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  #4  
Old 01-21-2013, 08:11 PM
ricky86 ricky86 is offline
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Did he remove it, or did it fall out during teardown? If it fell out, I'm with Pugs. New engine.
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  #5  
Old 01-22-2013, 07:47 AM
D C D C is offline
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Quote:
Originally Posted by ricky86 View Post
Did he remove it, or did it fall out during teardown? If it fell out, I'm with Pugs. New engine.
If you're doing a rebuild and can replace the worn bushing, what is gained by spending a LOT more on a new engine?
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  #6  
Old 01-22-2013, 08:08 AM
D C D C is offline
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Here's a past thread with good info on the topic: http://www.lawnsite.com/showthread.php?t=231911
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  #7  
Old 01-22-2013, 03:10 PM
pugs pugs is online now
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Quote:
Originally Posted by D C View Post
If you're doing a rebuild and can replace the worn bushing, what is gained by spending a LOT more on a new engine?
A 3 year warranty. A new starter motor. A new carb with all new linkages and no wear on the shafts or body. I would hope the engine rebuilder would be installing new valves and cutting the seats but who knows...so a new engine would have all of that new.

Also the newer engines have a better system of oiling that upper bushing that seems to be a problem in the older ones where they oiled it through the crankshaft instead of through the block as on the newer versions.
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  #8  
Old 01-22-2013, 03:31 PM
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piston slapper piston slapper is offline
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Quote:
Originally Posted by ricky86 View Post
Did he remove it, or did it fall out during teardown? If it fell out, I'm with Pugs. New engine.
I'm with you guys on this one....
If the bushing fell out of the block during disassembly....its junk...
The gearset would have wear issues ..and the rods would be sloppy..
A Boomerang engine...any re used parts would come back on you...
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Old 01-22-2013, 06:15 PM
teckjohn teckjohn is offline
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Kawasaki FH721 FH680 23 25 HP Engine Rebuild Kit Rebuilt Engine

Go here to buy your bushing
http://tewarehouse.com/921397009

here is where I posted it last time
http://www.lawnsite.com/showthread.php?t=385586

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  #10  
Old 01-22-2013, 06:30 PM
teckjohn teckjohn is offline
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Pic of bushing

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