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PIPER CHEROKEE WARRIOR SERVICE MANUAL
3. Fasten ground wire on electric timing light to any unpainted metallic portion of the engine.
Attach one of the positive wires of the timing light to a suitable terminal connected to the ground terminal
c o nnection of the right magneto. Turn engine crankshaft several degrees from BTC in direction opposite to
that of normal rotation.
4. Turn timing light switch ON. Turn the crankshaft very slowly in direction of normal rotation
until the timing mark on the front face of the ring gear support aligns with the drilled hole in the starter. The
timing light should go ON (on battery operated models). If not, turn the magneto in its mounting flange slots
and repeat the procedure until the timing light goes ON at 25 degrees before top dead center. Tighten the two
mounting nuts and replace magneto inspection plug.
c. To install left magneto (with impulse coupler) adapter and gasket on the mounting pad of the
access ory housing:
1. Remove inspection plug, depress pawl on impulse coupling shaft.
2. Turn impulse coupler on left magneto until the white beveled tooth (or middle tooth, if timing
gear has three beveled teeth) aligns with the timing pointer.
3. Without allowing the magneto gear to turn from position established in step d, 2, assemble the
left magneto to the accessory housing and secure with washers and nuts. Finger tighten nuts.
d. Time left magneto to the engine by the following procedure:
The crankshaft should not be rotated more than 10 degrees in
direction opposite normal rotation because the pawl on the
impulse coupling will engage with the stop pin and late timing
will be indicated through the impulse coupling mechanism. If
this event, rotate crankshaft in normal direction until sharp
click is heard; This will indicate that the impulse coupling has
passed through firing position. Turn crankshaft in direction
opposite normal rotation to approximately 35 degrees BTC and
proceed with timing check.
1. Connect the remaining positive wire of the timing light to a suitable terminal connection of the
left magneto
2. Time the left magneto in the same manner as described in steps b. 1 through 4..
e. After both magnetos have been individually timed, leave the timing light wires connected and
recheck magneto timing as previously described to make sure that both magnetos are set to fire together. If
timing is correct, both timing lights will go on simultaneously when the 25 degree mark aligns with the
c e n t e rline of the crankcase. If the breaker points open too early, loosen the mounting nuts and rotate the
m a gneto clockwise. If the breaker points open too late, rotate the magneto counterclockwise. Remove timing
light and ignition timing pointer, and replace timing inspection plug in magneto.
f .
After both magnetos have been properly timed, remove any trace of oil or dirt. Replace breaker
cover and lock the retaining screws together with lockwire.
Revised: February 28, 1995
Effectivity
NOTE
1L1
Island Enterprises
POWER PLANT
Magneto (BENDIX)
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