7-10 SERVICING INFORMATION
ELECTRICAL
NO SPARKING OR POOR SPARKING
SPARK PLUG SOON BECOMES FOULED WITH CARBON
SPARK PLUG BECOMES FOULED TOO SOON
SPARK PLUG ELECTRODES OVERHEAT OR BURN
GENERATOR DOES NOT CHARGE
GENERATOR DOES CHARGE, BUT CHARGING RATE IS BELOW THE SPECIFICATION
GENERATOR OVERCHARGES
Symptom, possible causes and remedy
• Defective CDI unit.
• Defective ignition coil.
• Defective spark plug.
• Defective generator coil.
• Loose connection of lead wire.
• Open-circuited wiring connections.
Replace.
Replace.
Replace.
Replace.
Connect or tighten.
Check and repair.
Symptom, possible causes and remedy
• Mixture too rich.
• Incorrect gasoline.
• Dirty air cleaner element.
• Incorrect spark plug.
Adjust carburetor.
Change.
Replace.
Replace.
Symptom, possible causes and remedy
• Worn piston rings.
• Worn piston or cylinder.
• Excessive clearance of valve stems in valve guides.
• Worn stem oil seal.
Replace.
Replace.
Replace.
Replace.
Symptom, possible causes and remedy
• Too hot spark plug.
• Overheated the engine.
• Loose spark plug.
• Too lean mixture.
Replace with cold type plug.
Tune up.
Retighten.
Adjust carburetor.
Symptom, possible causes and remedy
• Open- or short-circuited lead wires, or loose lead
connections.
• Short-circuited, grounded or open generator coil.
• Short-circuited or punctured regulator/rectifier.
Repair or replace or retighten.
Replace.
Replace.
Symptom, possible causes and remedy
• Lead wires tend to get short- or open-circuited or
loosely connected at terminals.
• Grounded or open-circuited generator coil.
• Defective regulator/rectifier.
• Defective cell plates in the battery.
Repair or retighten.
Replace.
Replace.
Replace the battery.
Symptom, possible causes and remedy
• Internal short-circuit in the battery.
• Damaged or defective regulator/rectifier.
• Poorly grounded regulator/rectifier.
Replace the battery.
Replace.
Clean and tighten ground connection.
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