RULE FOR TIMING THE MAGNETO
Find the firing order of the engine.
Turn crank shaft of engine and note directions in which armature and distributor of magneto should revolve.
Set No. 1 cylinder on beginning of power stroke by watching exhaust valve just close and then turning crank one complete revolution.
Set fly wheel so that mark No. 1. T. C. registers with pointer.
Retard spark fully—by moving breaker box in same direction as arrow points or armature rotates, as far as it will go.
Rotate armature in proper direction until interrupter points are just about to open.
In this position mesh gears and lock magneto to base.
At this point prove your work by advancing spark. If points are right they will open.
Notice what point in distributor the rotor is touching. This goes to No. 1 cylinder.
Wire distributor in firing order of the engine.
(The distributor always rotates in opposite direction to the armature.)