TM 5-3740-214-14
Table 5-3. Direct and General Support Maintenance Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
THE ENGINE IS HARD TO START (Continued)
Figure 5-75. Spark Plug Gap
c.
Check the spark plug gap.
(1)
Reset the gap at 0.025 inches (0.64 mm) if necessary, and go to Step 2d.
(2)
If the gap is okay, go to Step 2d.
d.
Check the spark plug for a spark.
(1)
Connect the spark plug wire to the spark plug and set the plug on a grounded part of the engine.
(2)
Turn the ignition switch ON.
(3)
Crank the engine by hand. When the points open and close, a spark will jump between the spark
plug electrodes.
(4)
If there is a bright blue spark, go to Step 2e.
(5)
If there is no spark, or the spark is weak and yellow, go to Step 3.
e.
Start the engine.
(1)
If the engine starts without trouble, the problem is solved.
(2)
If the engine does not start, or if it is hard to start, go to Step 3.
Step 3.
Check the spark plug wire.
a.
Remove the spark plug wire and test it with a volt-ohmmeter.
(1)
Attach a meter lead to each end of the spark plug wire.
(2)
If the meter reads below 40 k ohms (40,000) go to Step 4.
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