Table 4-3. Troubleshooting Chart (Continued)
TEST OR INSPECTION
ENGINE STOPS SUDDENLY (Continued)
Step 3. Make sure there is spark to spark plug.
a. Make sure ignition switch is turned OFF.
b. Remove spark plug wire from spark plug.
c. Turn ignition switch ON.
DO NOT hold the spark plug wire in your bare hands while testing for spark. You can be severely
Figure 4-47. Spark Test
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 the 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.
Step 4. Check fuel line.
BE SURE to disconnect the ground cable from the battery before performing maintenance on the
fuel tank assembly. Spilled gasoline will be ignited by a spark.
a. Check fuel line.
(1) If fuel line is ok, return it to valve and carburetor. Go to step 5.