(3) Place the end cap on the frame of the magneto and set the magneto for spark discharge to the No. 1
terminal. This may be accomplished by removing the spark plug lead and inserting a short, stiff wire into the
No. 1 socket. Bend the wire to within one-eighth inch of the magneto or engine frame.
(4) Turn the impulse coupling clockwise until a spark is observed between the wire and the frame. Hold the
coupling in the position in which the spark appeared.
(5) Without disturbing the setting of either the magneto or engine, couple the magneto to the engine by
engaging the drive lugs of the impulse coupling with the drive slots of the governor drive member. A slight
movement of the engine flywheel may be necessary to insure accurate alignment.
(6) Install the mounting screw (16, fig. 34) and lockwasher v (15) on the bottom part of the magneto (3).
(7) Install the mounting screw (7) and lockwasher (6) attaching the governor (8) to the magneto (3).
(8) Tighten the mounting screws (7 and 16) securely.
(9) Install the proper spark-plug leads (1) in their terminals and tighten the terminal nuts.
(10) Double-check the magneto timing by removing the end cap (20, fig. 33) and inspecting the distributor rotor
(21) position. With the magneto timed as described above, the distributor rotor must be pointing to No. 1
spark-plug lead terminal with the breaker points just starting to separate. Adjust the breaker points if
necessary (see e below) and replace the magneto end cap.
e. Adjusting Magneto Breaker Points.
(1) Remove the four mounting screws and remove the magneto end cap assembly (20, fig. 33).
(2) Check the clearance of the breaker points (16, fig. 35) when they are in fully open position. The proper
clearance is 0.015 inch at full separation.
(3) Adjust the breaker points by loosening the two screws (9) and moving the breaker plate (12) until the proper
clearance is obtained.
(4) Tighten the screws (9) and take a final measurement of the breaker point gap. Readjust if necessary.
f. Cleaning Magneto Breaker Points. Inspect the magneto breaker points for wear, pitting, or pyramiding. A small
tungsten file or fine stone may be used to resurface the points. Remove the oil from the breaker points with a small brush
dipped in a cleaning solvent. If the points are badly pitted or worn, they must be replaced.
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