Figure 4-22. Engine timing marks.

1. Flywheel timing hole

2. Flywheel

3. Timing hole cover

Figure 4-22. Engine timing marks.

(3) Mount the removed magneto in a vise

, and gasket (26) on the engine with the magneto lugs

thoroughly lined with soft cloths. Insert a spark plug

engaged.

Tighten the mounting bolts moderately.

cable into distributor block hole for spark plug No. 6.

Install and connect the spark plug cables.

Refer to figure 4-20. Turn the drive lugs clockwise while

(6) Start the engine and idle it at 600 rpm. If

holding the high tension cable for No. 6 cylinder close to

the engine fails to start, it is probably due to faulty

the magneto frame so that a spark will arc when the No.

ignition timing. Recheck as directed above.

6 cable is energized. When No. 6 cable arcs, the

(7) With the engine running at 600 rpm, use a

magneto is at the No. 6 firing position. Hold the

timing light connected to the rear spark plug and check

magneto drive shaft at this position.

that the IGN-M indication on the flywheel is aligned with

(4) Check the governor drive gear to make sure

the timing pointer. If it is not exactly aligned, loosen the

that the punch-marked tooth in the cam gear is engaged

magneto mounting hardware slightly

and rotate the

between the two punch-marked teeth on the governor

magneto slightly until the correct indication is attained.

drive gear. Refer to figure 4-22.

Tighten the mounting hardware firmly.

(5) Remove the magneto from the vise. Turn

(8) Install the cover (3, fig. 4-19) on the

the magneto drive lugs of the impulse coupling

magneto with four screws (1) and lock washers (2).

counterclockwise about one-quarter turn so that the lugs

will mesh with the drive members of the governor drive

gear. Position the magneto (25,fig. 4-19), spacer (27)

4-38