340 has no balls

To verify you stock damper timing mark, use a piston stop screwed into the #1 spark plug hole.

Rotate the crank clockwise until you hit the stop, mark the damper at the TDC mark on the timing pointer.

Rotate the crank counter clockwise until you hit the stop again, and mark the damper at TDC again. If the TDC groove on the original damper is exactly between the 2 marks you made, then the original damper is good.


It takes 5 minutes and could save you a few hundred bucks.