TM 5-3740-214-14
Table 4-3. Troubleshooting Chart (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE LACKS POWER (Continued)
Figure 4-52. Spark Plug Location
Step 3. Make sure there is spark to spark plug.
a. Turn ignition switch OFF.
b. Remove spark plug wire from spark plug.
c. Turn ignition switch ON.
WARNING
DO NOT hold the spark plug wire in your bare hands while testing for spark. You can be severely
shocked.
d. Hold spark plug wire about 3/16 inch (4.76 mm) from a grounded engine part.
e. Remove belt guard and crank the engine over. As breaker points open and close,
a spark should jump between spark plug wire and engine.
(1) If there is a bright blue spark, go to step 4.
(2) If there is no spark, or the spark is weak and yellow, notify your supervisor of
the problem.
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