Piper COMANCHE PA-24-180 Service Manual page 378

PIPER COMANCHE SERVICE MANUAL
IEASURE 3CDY
OICKNESS
MERE
LEFT ROTATION
FIGURE 7A-15. LEAD POSITIONING FIGURE 7A-16. IMPULSE COUPLING
NOTE
The magneto service instructions in this manual are to cover minor
repairs and timing For further repairs and adjustments of the
magnetos. it is recommended that the manufacturer's service
instructions be followed
7A-70 Removal Of Magneto.
a Lift the side panels of the engine cowling
b Disconnect the "P" lead from the magneto and the retard breaker lead from the left. -200 series.
magneto
c
Remo'e the harness outlet plate from the magneto by removing the four attaching scre s
d
Remoxe the two nuts and washers securing the magneto to the engine accessory housing
e Pull the magneto from the engine
7A-71 Timing Procedure. (Internal Timing) -20 and -200 series Magneto Main Breaker Points When
installing new or adjusting breaker points and before timing the magneto to the engine. it is important that
the internal timing of the magneto be correct
a
To internally time the magneto it should be removed from the engine to determine "E" gap
b
To determine "E" gap. find neutral position of the magneto drie by rotating drive coupling in a
timing inspection hole. At the same location. the drive should feel to have fallen into a notch or neutral
position
ISSUED: 8/18/72 POWER PI.,
2D20