Re: Compression test procedure?
Warm engine. Ignition disabled (pull kill switch), remove plugs. Install gauge and spin engine 6 or 8 revs. No oil unless you doing further diagnosis of an apparent issue such as low compression on one cylinder. Numbers should ideally be within 10% of each other and over 100# or whatever your service manual indicates. Throttle needs to be full open on a four stroke motor but it doesn't matter on a two-stroke.
