Piper COMANCHE PA-24-180 Service Manual page 321

FIGURE 7-13. TIMING PLATE INSTALLED
FIGURE 7-14. BREAKER COMPARTMENT WITH
ON BREAKER COMPARTMENT CAST TIMING MARKS
d. Route the drive coupling from neutrl, in a left hand direction 10 . Look through the tuning
hole and align the chamfered tooth of the distributor gear with the white line of the distrbutor block.
Asceraun that the main breaker poinu open at thi point and the pointer indicates 10 on the plate or "E"
gap in the breaker comparnment.
e. Without moving the drive coupling from the "E" gap or 10 afer neural position, bend the
pointer back to the 0
°
mark.
f.
Using Data Table VII-Il determine the degree of retard of the rragneto being checked. Normally
the correct retard setting will be stuaped in bottom of breaker compartment for convenience.
g. Turn the drive coupling in the left hand direction until the pointer reaches the required number of
degrees retard, the retard breaker points should open at this point.
i.
Rotate drive coupler. until cam follower is on the high point of the cam lobe. Measure contact
clearance. It must be 0 018 or the points must be replaced.
CAUTION
If cam screw was removed be sure to reinstall and torque to 25 inch
pounds.
TABLE VII4. TLMING DATA
Magneco
Magneto Type
Part No. Degree Retard
S4LN-200 10-163005-1
20L
10-163005-2. -3. 7 25°
10-163005-5 30°
POWER PLANT
ISSUED: 8/18/72
2 B11
PIPER COMANCHE SERVICE MANUAL
UMI*E
Oo
OiRECS
.. T&'.