Jun/Jul 2008

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Removing Stuck 2-Stroke Pistons

By Doc Shustor,

 3535 Glen Oak Drive, Eugene, Oregon 97405

Recently a reader was faced with the problem of removing a stuck piston from a 2-stroke engine, realizing that the good old grease/oil pressure method would not work because of porting. Can't remember how he solved the problem, for trying to drive out the piston with a narrow rod through the spark plug hole in the non-removable head is most hazardous for the future of the piston.

As a recipient of a very ancient Vaughan 4 HP drag saw, I was faced with the same problem. On this 2-stroke engine even blocking the intake and exhaust openings would not help because fuel-oil mixture enters the cylinders through large ports in the piston wall! Prolonged soaking of kerosene and penetrating oil did not seem to help any either. But there had to be a way of removing that piston, short of using dynamite.

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