Operating instructions

8-13
8-27. PLACING CRANKSHAFT IN TIMING
POSITION TYPICAL OF SANDCAST
CRANKCASE.
a. Cover the lower spark plug hole with the thumb
and turn crankshaft clockwise until pressure is felt on
thumb. The timing marks on the crankshaft flange are
now turning towards the bottom parting line of the
crankcase halves.
b. Using an adjustable square or depth gauge on the
front of the crankshaft flange, align the applicable
timing mark on the crankshaft flange with the
crankcase bottom parting line flange.
8-28. PLACING CRANKSHAFT IN TIMING
POSITION TYPICAL OF PERMOLD CRANK
CASE.
a. Cover the lower spark plug hole of No.1 cylinder
with thumb and turn crankshaft until pressure is felt
on thumb.
b. Remove plug (66, Figure 4-22) in front of No.6
cylinder and observe the timing mark on the alternator
drive gear as the crankshaft is rotated slowly. When
the mark on the gear is centered in the viewing hole,
No.1 piston is at the 22° BTC position.
8-29. MAGNETOS.
a. Remove inspection hole plugs from magnetos.
b. Turn impulse coupling backward, so latches will
not engage, until timing pointer inside inspection hole
is aligned with marked distributor gear tooth.
c. Without turning the magneto coupling, hold the
magneto in the horizontal position it will occupy when
installed, and check alignment of gear coupling slot
and impulse coupling lugs. If not aligned, pull gear
out of mesh, but not out of oil seal, and turn to correct
alignment. Push gear back into mesh.
d. Place a new gasket on magneto flange and in- stall
magneto carefully so drive coupling lugs mate with
slots of drive bushings. Install holding washers, lock
washers and nuts, but tighten only enough to permit
turning the magneto for final timing, without
looseness. Install right magneto with outer end
slightly below horizontal and left magneto with outer
end slightly above horizontal.
e. Connect timing light lead to the ground terminal of
each magneto. Both timing lights should be on. Tap
the right magneto up with a non-marring hammer until
that light goes out. Tap the left magneto down until
the light goes out. Secure magnetos.
f. Turn the crankshaft a few degrees counterclockwise
and bring it back again until the timing marks are
aligned. At this point both timing lights should go out
at the same instant that the timing mark on the
crankshaft flange aligns with the crankcase parting
flange or the timing mark on the alternator drive gear
appears in the center of the crankcase inspection hole.
g. If timing lights do not go out at the same time,
loosen the magneto that is late or early and repeat the
process outlined in step "f" above.
8-30. IGNITION HARNESS.
a. The high tension cable outlet plates can be attached
to either magneto in only one position. The very
shortest ignition cable is for No.1 upper spark plug,
and identifies proper assembly for the right magneto.
Notice the "1" on the outlet plates next to the No.1
cylinder cable outlet holes.
b. Attach cable outlet plate to magneto.
c. Lay lower spark plug cables from each magneto
across the brace on crankcase top flange in two layers
of three cables each. Install clamp and its attaching
parts.
d. Install a clamp on each ignition cable and position
fuel discharge tube bracket over cables on right
cylinder bank.
e. Snap retaining clamp of cable 1R into top hole in
rear leg of bracket. Following this, starting from the
rear, snap 1L into first hole, 3R into 3rd hole, 3L into
fourth hole, 5R into sixth hole and 5L into front leg of
bracket. Position bracket so that its centerline is 6-3/4
inches from edge of No. 1R ferrule and 20-3/4 inches
from edge of No. 5L ferrule. Position second bracket
over cables on left cylinder bank. Snap retaining
clamp of No. 2L cable into bottom and 2R into top
hole in rear leg of bracket. Starting from the rear,
snap cable 4R into second hole, 4L into fourth hole,
6R into sixth hole and 6L into hole in front leg of
bracket.