Place ignition switch in Off position.
Attach black ground to an unpainted stud or other good ground on
Disconnect primary lead from breaker.
Connect one of the red leads in its place. If there is only one
magneto be sure the second red lead is not grounded and go to Step 7.
For a two magneto system, remove the primary lead from the second
magneto's breaker points.
Attach the second red lead to the breaker points of the second
Turn timing unit switch on.
Turn ignition switch on.
Rotate engine slowly - when the light goes out the breaker points are
closed. Each light will indicate the exact point of the opening and
closing of its corresponding breaker point.
If two magnetos are being synchronized, adjust them until both lights
are turning on and off at the same time. The magnetos are now in
Turn off timing light switch.
Turn off ignition switch.
Remove timing light.
Be sure to replace all wires and secure connections which have been
removed for the timing process.
REMEMBER - When the light goes OUT the points are CLOSED.