[Michael C Henry]

Piston stop bolt goes in place of #1 spark plug with the timing marks some where close to but not actually on Top Dead Center. Turn the crank by hand in one direction untill stop bolt is contacted and stops #1 piston, mark the place the timing pointer indicates on balancer. Then rotate crank shaft by hand in the other direction untill #1 piston contacts stop bolt. Mark the point the pointer indicates on the harmonic balancer. TDC is in the middle of those two marks. the closer the piston gets to TDC before it contacts the stop bolt the smaller the distance between the two marks. Do not adjust the stop bolt between going the two different directions as that would change things and the center would be off.