Magneto - TM-5-4320-272-120059

(4) Positive probe connected to black lead.

the spark discharge which should occur during the

Negative probe connected to red lead.

cycle, at the instant the impulse coupling on the

magneto snaps. Repeat this check with each of the

(5) Positive probe connected to black lead.

Negative probe connected to engine ground.

other ignition wires.

b. Replacing and Adjusting Breaker Point

4-25. Magneto

Assembly.

a. Checking Magneto Spark. You can test the

(1) Remove the screws (21 and 22, fig. 4-9)

strength o f t h e m a g n e t o ignition s p a r k by

that secure the end cap assembly (23) to the housing

disconnecting the number 1 ignition wire from the

( 4 3 ) . You can remove the end cap from the

spark plug and holding the terminal 1/8 inch away

magneto without disconnecting the spark plug

from the air shroud or any other metal part of the

cables (4 thru 7). Remove the end cap assembly.

engine. Using the starting crank, slowly turn the

Remove and discard the end cap gasket (24).

engine over two complete revolutions and watch for