View Full Version : msd 20

09-02-2003, 12:07 PM
Has any on had trouble with shearing roll pin on msd 20 I will only get about 5 passes and shear my roll pin on drive gear to cam. I replaced the oil pump the gears mesh just at 3/4 of the way up the gear. I machined out a collar for the mag so it fit tightly in the manifold. I dont get it.

Any help would be app.

thanks Chris

09-02-2003, 02:32 PM
If all the mechanical parts as far as oil pump, cam and valve train were in good working order, I would recommend readjusting the generator so that the gear mesh is centered on the generator gear. The other would be to make sure the engine is not detonating; we have run into one instance where the engine was detonating and causing the roll pin to shear off.