IGNITION SYSTEM
Troubleshooting
Problem
Possible Cause
Suggested Remedy
Misfiring, no firing, engine surges,
engine dies (Note: these
symptoms may also be caused by
fuel system problems)
Spark plug or lead wire loose
Spark plug in poor condition
CD Pack air gap wrong
Tighten plug
Replace plug
Adjust
CD Pack high tension lead loose
Secure with GE silicon sealant
Clean and tighten leads/replace
CD Pack leads loose, dirty, or
grounding
CD Pack defective
Replace CD Pack
Flywheel key damaged or sheared
Replace key and check keyway
(see Servicing the Flywheel in this
section)
Flywheel magnets demagnetized
or weak
Replace flywheel
Engine will not stop
Broken ground wire
Check the ground wire between the
mag and kill switch. Look for
breaks or loose connections.
Testing
Check the ignition system in the following order:
1.
2.
3.
Spark plug (connection & wire, condition).
CD Pack (air gap, connections or spark).
Flywheel (key and magnets).
Use the table above to aid in diagnosing the problem.
Spark Plug Operation
The spark plug ignites the oil-fuel mixture by producing
a spark just before the piston reaches top dead center
(TDC). A spark plug is typically constructed as shown.
(See Figure 46.)
Figure 46
D. Head Insulator
E. Copper core
Leg Insulator
G. Gap
3297-014
A. Metal Shell
B. Center Electrode
C. Ground Electrode
F.
31
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