Originally Posted by
FlyinHigh
But I tried to turn it witout the piston/liner and con rod and it still gets stuck (before changing crankshaft) Now that the crank is new it still fells a little bit tight at some point
, My LHS says its ok
My other engines does not do that
By the way thanx for the tips on greasing o rings
Oops sorry
I just assumed you had it all assembled.
OK - sounds like you have a bearing problem, can't be much else. Either one of the bearings is faulty, or one of them is not sitting fully or squarley in the crankcase. I would lean toward the later. Normally bearings only get rough or "notchy". It would have to be partially seized to stop the crankshaft turning, and I am sure you would have picked that up straight away.
Do you have access to a bearing removal / installation tool. If so, heat up the crankcase real hot, and try to ensure the bearings are seated properly with the tool. If not heat up and gently tap the bearings all around the circumference with a soft wooden dowell or something similar to make sure thay are seated properly. You mentioned you thought one of the bearings was a little off line - could well be they were not fitted correctly, especially if they were seated in without heating the crankcase first.
Let us know what happens
