Author Topic: Need a piston ring  (Read 1247 times)

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Offline 660magnum

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Re: Need a piston ring
« on: July 28, 2015, 08:30:05 pm »
With the Homelite 30 piston ported engine, the set up was done much like a chainsaw engine. It would have cylinder cut down. The piston would be crowned .020". It's a counter lever crank type engine so the crankcase is stuffed with either a plate or the back of the crankcase is cut down so there is .020" clearance between the crank pin and the the back plate. The squish is set to .020" to the cut down part of the piston. The early ones had a forged crankshaft.

They run about the same rpm's the good chainsaws do. Sometimes 20,000 with the thin rings
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