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old ski-dool
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Just the one? or both?
Was this a product of an extended wide open pull?
Water in fuel frozen in the carb jets.
Carb boots.
Crank seal.
 

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Discussion Starter · #13 ·
That is the 2nd set of pistons. First set, one was installed incorrectly.

Thanks for the replies. He's pulling the motor and will check for air leaks. I have this feeling that he may have a hole somewhere (crank). Hope I'm wrong and it is just a gasket or something.
 

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Would have been helpful to do a pressure test before tearing the motor down. Then you'd know if you had an air leak.
 
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