Originally Posted by
gmkiller1967
Replaced pressure line and fuel line just incase. Put new plug clutch bearings and clutch shoes on. Fired it up and same thing runs awesome for a while then just out of no where no low end.
I have had engines with severely scored P/S set run pretty well cold then lose all bottom end once they warmed up because all the compression was gone.
Did you lawn dart it really hard?
Wrist pin clip pop out ?
You might want to pull the P/S and check.