Piper Lance II - Timing Light Connected to Magneto

A957
P/N
10-38298
BENDIX
SWITCH
LEAD
TERMINAL KIT
Figure 8-12.
Timing
Light Connected
to Magneto
d. The
magneto
incorporates
a built-in
pointer and
a degree wheel
with sufficient
reference
to assist
the mechanic
in magneto
timing procedures.
Printed
upon the
rotating
magnet are
marks to
indicate magneto
neutral
and magneto
"E" gap (8').
(Refer to
Figure
8-13.)
Also
included
are retard
angle references
of 10, 15,
20 and 25
degrees.
These marks
are set
up for either
clockwise
(R) or counterclockwise
(L) rotation
of the magneto
as
viewed
from the
magneto
drive end.
The
timing tooth
of each
large
distributor
gear is
marked with red paint.
(Refer to Figure
8-14.)
NOTE
A magneto,
correctly timed internally,
will have the timing
teeth of
the large
distributor
gears approximately
centered
in the timing
windows
at each end of the magneto;
the L ("E" gap) mark which
is closest
to the "K" or
keyway up position
indicator
on the rotor
in alignment
with the pointer,
and both
main breaker
points open-
ing all at
the same time.
These three
references,
"E" gap, painted
teeth, and point
opening are
all used when
timing the
magneto to
the engine.
e.
Remove the
magneto
drive gear
backlash by
turning the
propeller
opposite to
normal
rotation
approximately
40 past
No. 1 firing
position;
then turn
propeller in
direction
of normal
rotation up
to No. 1 firing
position of
20 BTC.
Revised
6/15/79
POWER
PLANT
2B5
LANCE
II SERVICE
MANUAL