Piper Cherokee Six Service Manual page 382

PIPER CHEROKEE SIX SERVICE MANUAL
NOTE
The magneto
service
instructions
in this manual are
to cover minor repairs
and timing.
For further
re-
pairs and adjustments
of the magnetos,
it is recom-
mended that the manufacturer's
service
instructions
be followed.
7-26. TIMING PROCEDURE.
(Internal Timing)
(-20 and -200 Series Magnetos)
When installing
new or adjusting
breaker points and before timing the mag-
neto to the engine, it is important
that the internal
timing of the magneto be cor-
rect.
a.
To internally time the -20 series and the early -200 series magneto without
the case in timing marks, the magneto should be removed
from the engine to de-
termine
"E" gap.
b. To determine
"E" gap, find neutral position of the magneto drive by rotating
drive coupling in a left hand direction
until the red or white chamfered
tooth on
the distributordrivegear
appears throughthetiming
inspection
hole. At the same
location,
the drive should feel to have fallen into a notch or neutral position.
c. With timing plate and pointer attached
(Refer to Figure 7-9) and pointer
set
at zero, rotate coupling
from neutral,
in a left hand direction
10
°
. Appearing
through timing hole, ascertain
if the white or red tooth aligns with the white line
of the distributor
block. (Refer to Figure 7-8.)
Alignment
may not vary over
4
°
.
926
RED OR
WHITE TOOTH
CAM WASHER
TIMING MARK-
Figure 7-8.
Magneto Timing Marks
Figure 7-9.
Timing Pointer
POWER PLANT
Issued: 8/17/72
2F10