Piper COMANCHE PA-24-180 Service Manual page 426

LEF MAGNETO
PIPER COMANCHE SERVICE MANUAL
A m
RIGHT MAGNETO
SWITCH
COMBINATION STARTER AND IGNITION SWITCH
STARTING MOTOR
SCHEMATIC WIRING DIAGRAM
IGNTION SYSTEM - RETARD BREAKER MAGNETO
SINGLE ENGINE
FIGURE 78-14. IGNITION SYSTEM RETARD BREAKER MAGNETO INSTALLATION
7B-47 Saring Vibrtor. (Refer to Figure 7B-14 )
a. Disconnect
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spark plug leads from the left magneto, at the spark plugs
CAUTION
Be sure all left magneto spark plug leads are removed, thus preventing
cross-firing of the magneto and the possiublicy of hazardous conditions.
b. Rotate engine crankshaft until number one cylinder is in its retard finng positon. LUsng the
11-51 Timing Light. check to see that both magneto contact assemblies are open.
c. Elecmcally disconnect starter from starter solenoid. If this is not possible, remove battery terminal
from starter switch or remove surter switch terminal from vibrator.
CAUTION
It Ls necessary that the starter be elecrcallv removed from the circuit before the vibrator
is put into operation to eluminate possibility of
starer
being energized dunng the rest
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d. Place combination switch in is "LEFT" oosition.
POWER PLANT
ISSUED: 8/18/72
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2 F20