(4) Remove the magneto (par. 115) and hold
e. Installation.
the magneto (9, fig. 20) in the same
(1) Install the gasket on the mounting plate
position it will occupy in the bracket.
(24, fig. 25), and place the control box
(5) Turn the magneto gear clockwise until it
(23) on the gasket and mounting plate.
stops turning freely.
(2) Install the four nuts (2), which secure the
(6) Start the magneto into the bracket; before
control box.
the magneto gear meshes with the idler
(3) Connect the idle control (18) to the control
gear remove the pipe plug (13, fig. 22)
bracket (21) and the carburetor (7, fig. 7).
and look through the adjusting slot, and
(4) Connect the choke control (16, fig. 25) to
see that the magneto mounting hole is
the control bracket (21) and the carburetor
located so the mounting screw can travel
(19, fig. 20).
about the same distance in either
(5) Connect the two terminal leads (13 and
direction on the slot.
15, fig. 25) at the control box (23), by
(7) Secure the magneto in position (par. 115).
installing the two cable nuts (12) which
(8) Rotate the blower wheel (1, fig. 31) slowly
secure the terminal cables to the control
in a clockwise direction until the impulse
box.
coupling makes a distinct loud click.
(9) The witness mark (9) should now line up
119. Ignition
with the 11° mark on the gear cover.
a. Testing for Spark.
(1) To determine if the ignition system is
120. Starter-Generator Brushes
producing a sufficient spark, disconnect
a. Removal.
one of the spark plug cables at the spark
plug.
(1) Remove the blower wheel hub (5, fig. 12)
by removing the four screws (6), and the
(2) Support the end of the spark plug cable
nut (8), lockwasher, and flat washer (7),
3/16 inch from a bare metal part of the
which secures the blower wheel hub to the
engine.
blower wheel (1, fig.31).
(3) Crank the engine rapidly.
(2) Remove the hub by pulling straight out
(4) The spark should jump the '16 inch gap,
and off the crankshaft.
showing a sharp blue color.
(3) Remove the four brushes (7, fig. 27) by
(5) If the spark fails to jump the gap, or shows
removing four screws (5), which secure
a weak spark, make repairs as necessary
the brushes in place.
(4) Remove the brush block assembly (10)
b. Ignition Timing Adjustment.
and springs (3) by removing eight screws
(1) Reference marks for timing the ignition (1,
(4) which secure the brush blocks to the
2 and 12, fig. 27) are indicated on the
starter-generator frame.
upper-front portion of the gearcase (14),
(5) Remove the condenser (9) by removing
and a witness mark (9, fig. 31) on the
the screw (8) which secures the
blower wheel (1).
condenser to the bearing support (11).
(2) Remove the air shroud (4, fig. 12) by
(6) Remove the bearing support by removing
removing the three screws (7, fig. 23)
eight screws (6) which secure the bearing
which secure the blower cover to the
support to the starter-generator frame.
engine.
b. Cleaning, Inspection, and Repair.
(3) Rotate the blower wheel until the witness
(1) Visually inspect for broken wires and be
mark TC is 1/4 revolution or 900 to the
sure all connections are clean and tight.
left of the TC mark on the gear cover or in
line with No. 1 cylinder.
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