Mag/distrubutor removal and reinstall

Timing of the magneto can be changed by loosening the two magneto attaching screws and swinging the top of the magneto toward the crankcase for retard and away for advance. The impulse coupling missing speed is 150 r.p.m.

When replacing the magneto, crank the engine so that the no.1 piston is at TDC. Remove the distributor cap, and turn the magneto until the distributor rotor points toward no.1 on the cap, then fasten the magneto to the bracket. Be sure the prongs on the coupling engage the slot in the drive shaft. Next rotate the top of the magneto toward the crankcase as far as possible and crank the engine again to no.1 TDC. Now move the magneto away from the crankcase until the impulse coupling trips. Complete the tightening of the holding cap screws; the engine is now timed.

To tell if it's on TDC, remove the no.1 spark plug and place your thumb over the hole and slowy crank over the engine, you should feel compression, but feel carefully when the pressure JUST stops, it's on TDC.

If this is not the info you need or you need more help, let me know.

Good luck!

Andy Motteberg

IIRC, it's the single notch. There may also be a double notch, which is for checking advance with the engine running. Hopefully someone will correct me if I'm wrong.

The easiest way to find TDC is to remove #1 spark plug, put your thumb over the spark plug hole, and slowly rotate the engine until air starts whistling out around your thumb. Align the mark, and you're at TDC.

HOWEVER, if you marked everything, made sure nothing fell apart, and didn't rotate the engine while you had the mag off, you should be able to put it right back on, and the tractor will start and run just like it did before.