Originally Posted by Drumzz6768
did all that. Compression feels good with thumb over spark plug hole, blows my thumb off hole. Where would crank seal be ?
How can it turnover with bad key switch or kill switch ? They seem to work as they should ?
Thumb pop test isn't always accurate. Crank seal behind the drive clutch is the worst one to either leak or even pop out as some have found. A simple short in any of the switches wiring can cause problems as they both tie into the cdi kill circuit.That's why the first test is to isolate the cdi from the switches. Do a good compression check first. Anything under a 100 psi isn't good. Also a leak down test can tell you if crank seals,head gasket,base gasket or the engine case itself could be the problem.