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Old 06-21-2011, 06:09 PM   #1
kwest0425
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Yamaha
 
Join Date: Jul 2007
Location: Newark, Delaware
Posts: 33
Default G1 problem - Rings/Bearings/something else?

I am soliciting opinions.

Have an 81' G1 that has been running great. The other day I started in reverse. Started right up, backed up about 4 ft, it coughed and died. I tried to restart it and it turned over very slowly like the battery was almost dead. Then it wouldn't turn over at all. Charged, then replaced the battery, same issue. Cleaned all the terminals (see my thread - g1 starter/generator - broken terminal). Same issue. Removed the spark plug and belts and turned the engine by hand and it would occasionly hang up or become difficult to turn. Pulled the engine, thinking I had a bottom end problem, and removed the head and jug. The engine spun freely although I could here the crank bearing clicking (maybe normal). I tried to put the jug back on and it kept hanging up on the bottom ring. On closer inspection, I saw the ring was in three pieces. I don't think I broke it, but its possible.

Here's my questions:

Would a broken ring account for the symptoms I saw?
Is the clicking of the crank bearings normal or do I have a bearing problem?
What would you do? Rings and gaskets, top end rebuild, or ($$$) full rebuild?

Thanks in advance

-kwest
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