G424 Service Manual Adjustment and Troubleshooting192
Cracked distributor cap and burnt or –Clean or replace.
contaminated cord insertion hole
Centrifugal and vacuum advance device –Repair or replace.
malfunction
Improper spark plug gap –Adjust or replace.
Carbon deposit in spark plug –Clean or replace.
Improper heat range of spark plug –Replace spark plug with proper one.
Loose or defective plug cord –Repair or replace.
Defective ignition coil –Replace ignition coil.
Improperly connected terminals –Repair.
Switch contacts in loose contact –Replace switch
Magnet switch contact plate burnt or in –Grind or replace contact plate.
loose contact
Magnet switch pull-in coil opencircuited –Replace.
Magnet switch holding coil opencircuited –Replace.
Brush in loose contact with commutator –Reface.
as a result of wear
Commutator burnt with consequent poor –Exchange or replace commutators.
conduction of electricity
High mica of commutator –Perform under-cutting
Field coil not properly grounded or –Replace.
short-circuited
Field coil not properly soldered –Repair.
Armature not properly grounded –Replace.
Armature short-circuited –Rewind or replace.
Brush spring broken or with inadequate tension –Replace spring.
Poor engine starting
Poor engine
acceleration
Insufficient engine
output
Excessive fuel
consumption
Poor engine starting
Insufficient engine
output
Poor engine staring
Poor engine
acceleration
Starter does not
rotate
Poor engine
acceleration
Abnormal
combustion in
engine
Distributor
Starter
Spark plug
Ignition coil
Electrical components
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