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175HP TOP CRANK BEARING

 
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SPORTJET



Joined: 08 Jul 2009
Posts: 1

PostPosted: Wed Jul 08, 2009 7:08 am    Post subject: 175HP TOP CRANK BEARING Reply with quote

New to site & trying to work on my own engine. Have 175HP SPORTJET combo, thru a rod! Was given another engine to swap, but it was very tight! Would hit & then sieze, wait a few minutes would turn over & hit again. Was told it was top main bearing. Took the bearing out of the motor that had broke rod & put it in the "good used motor". It now runs for aprox 10-20 seconds & does the same thing. Old bearing deffinatly looked bad & the used 1 I put looked much better, but not sure, being I have never seen a new 1 before. Anyway, my question is, should I just go ahead & replace all the main bearings or maybe just this top 1? What little info I got locally say these motors are very bad about loosing this top bearing only? Any & all help will be greatly appriciated.
Thanks to all who respond.
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MikeW
Senior Member


Joined: 01 May 2006
Posts: 680

PostPosted: Wed Jul 15, 2009 10:03 am    Post subject: Reply with quote

Take time to do it right the first time! Replace all the bearings.
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