I need to pull the flywheel to my Lister STA. I suspect that the key is sheared and I want to check it. The engine runs well but I was trying to check the fuel pump timing and it appears to be way off.

The only way that I can imagine the engine running with the timing off is if the key is sheared and the flywheel out of position and the timing is actually correct.

Anyway, since this engine rotates counterclockwise, Is the bolt reverse threads to keep it from loosening. I know it is locked by a washer but from my experience reverse threads have always been used in this situation. I don't want to apply force until I know which way to go.

Regards,

Dave P.