Has anyone ever used a leak down tester on their 2 cycle engines? A friend of mine bought her husband a chainsaw from the pawn shop the other day and asked me to check it out for her. Pulled the cover off, no air filter, pulled the plug, cyl is scratched up bad, saw will run, but very hard to start. Checked compression, highest reading was a surprising 120lbs. My koritz, echo chainsaw conversion engine has 160lbs. Leakdown test on the Koritz showed 8 percent leakage, leakdown on the poulan 42 chainsaw was 60 percent. I checked my wifes chain saw, puolan, 6 percent leakage, 155 lbs comp, and my ryobi 31, 5 percent leakage.
If you check it with a leakdown tester, take note of this, if you turn loose the prop it will spin like its got a starter motor on it!!! Best thing is to take the prop off. Steve