Lesson 3/Learning Event 2
Step 3. For the model 1A08-3 engine, be sure the ignition switch is on and is functional.
Remove the spark plug cable from the spark plug. Ground the cable by holding the cable nut
against the side of the spark plug with the spring approximately 1/4 inch from the plug or any
metal part of the engine. Turn the engine over using the starting rope. If a spark jumps from the
spring to the engine, remove the spark plug, reconnect the cable, and ground the spark plug to the
side of the engine. Turn the engine over and see if there is a spark at the electrode end of the
plug. If there is a good strong spark at the spark plug, go on to step 4. If no spark is seen at the
spark plug or cable, then the contact assembly, condenser, and engine timing should be checked.
If the spark plug needs replacing, remove the spark plug (page 48, SPARK
PLUG AND CABLE).
Do NOT bend the ground electrode.
Step 4. Check the fuel filter to see if it is clogged or if the filter element is dirty. Remove the
outlet line from the filter to check the flow of fuel. If no fuel or a very small flow of fuel is
noticed at the outlet side of the filter, remove and clean the fuel filter. If the fuel flow is
sufficient, go on to step 5. To remove and clean the fuel filter, shut off the fuel at the top of filter,
then loosen the thumbscrew holding the bowl to the filter. Swing the bail to one side and remove
the bowl. Remove and clean the filter in a dry-cleaning solvent. Inspect the gasket and replace if
necessary. After cleaning, install the gasket firmly into the filter head. Install a clean or new
filter element and then install the bowl. Swing the bail under the bowl and tighten the
thumbscrew. Turn on the fuel. Check for leaks.
Step 5. Remove the fuel line from the fuel pump to the carburetor. Turn the engine over using
the starting rope. If the fuel flow is coming out of the fuel pump in a steady spurt, go on to step 6.
If no fuel is seen coming out or a weak flow is noticed, have the fuel pump replaced.
Step 6. Check the carburetor and throttle controls for adjustment. Refer to figure 16 on page
44 and Lesson 3, Learning Event 1. If the adjustment of the carburetor and throttle controls does
not resolve the problem, replace the carburetor and/or throttle controls.
Engine Starts but Fails to Continue Running. If the engine will start but will not keep running,
perform the following steps.