Piper COMANCHE PA-24-180 Service Manual page 379

RED OR
WHITE TOOTH
2 1/4 IN.
SOFT
WIRE
SOLDER 3/
4
IN.
CAM WASHER
TIMING MARK—
FIGURE 7A-17. MAGNETO TIMING MARKS
FIGURE 7A-18. TIMING POINTER
c. Rotate coupling from neutral. in a left hand direction 10 . Appearing through timing hole, when
the white or red tooth aligns with the white line of the distributor block, the magneto is set at "E" gap.
(Refer to Figure 7A-17.) Alignment may not vary over 4.
d. Using the alignment of the chamfered tooth on the distributor gear and the white line on the
distributor block as a reference, adjust the breaker points to open at this point. Turn the magneto drive
until the cam follower is on high point of the cam lobe Measure contact clearance, it must be 018 inch =
006 with the point opening set at "E" gap - 1. If breaker points do not come within tolerances, they
should be replaced.
7A-72. Adjusting Retard Breaker Points -200 Series Magnetos.
a. Install timing plate and pointer on magnetos without timing marks cast in the breaker
compartment
(refer to Figure 7A-19) orjust the pointer on magnetos with timing marks cast in the breaker
compartment. (Refer to Figure 7A-20 )
NOTE
A timing kit, including timing plate, etc. may be purchased through the
engine or magneto manufacturer.
A pointer may be formed as shown in
Figure 7A-18
NOTE
A pointer can also be made by wrapping a piece of soft wire tightly
around the head of cam securing screw and bending it to extend over
timing marks.
POWER PLANT
ISSUED: 8/18/72
2 D21
PIPER COMANCHE SERVICE MANUAL