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Zimmy
Make a stop from an old spark plug by removing the center electrode and outer shell from the upper section. Install and
SECURE a short bolt through the center hole. Be sure it is tight
so you won't loose anything into the cylinder bore. Have the
bolt extend about an inch beyond the threads. All you are looking for is a rigid stop for piston travel. With this installed in
number one, rotate the engine carefully BY HAND untill the piston
comes to rest. Mark the c/s pully and reverse direction and do the same thing. The center of the two marks is TDC. Do this slowly and carefully and you won't damage anything.
Ron
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