Reply To: QD-20 compression.

[tinkerman]

I have yet to get accurate pressure readings with a standard harbor freight compression gauge. The hoses are too long. I checked my 59 lark 35 hp yesterday and 60 on each cylinder, although I’m satisfied it’s much higher. 60 seems to be the largest number I’ve ever achieved on any engine and a bunch of em have been good runners. I need to take the time to build a simple short compression guage, as that’s where the trouble is with the small two stroke motors and testing

It's a jungle out there.