Phenomenon Assumed cause Action
Discharged battery Charge or
replace
Cell motor Detached or loosened or corroded Repair
will not run
battery terminal
Engine will or revolution Battery switch set at OFF position Turn ON
not start
speed is low
Improper starter switch
Replace
up Improper starter Replace
Broken lead wire Repair
Cell motor Fuel shortage Supply
runs Blinded fuel filter Replace element
Air in fuel system Remove
Air in fuel system Remove
Speed will not rise Blinded fuel filter
Replace element
Compression failure Repair engine
Blinded air cleaner
Replace element
Oil shortage Supply
Engine stop by oil failure
Oil pressure switch failure
Replace
Blinded oil filter Replace element
Cooling water shortage Supply
Over heat Fan belt looseness Adjust
(water temperature) Blinded core of radiator
Clean
Engine thermostat failure Repair
Voltmeter failure Replace
AVR failure
Burned ZNR
Voltmeter will not operate Quenched residual magnetism Contact
(Except 25USI USI2) distributor or
Burned rotary rectifier
our office
Disconnected rotor wiring
Burned generator wiring
Voltmeter failure Replace
AVR failure
Rated voltage will not be VR failure Contact
reached Burned rotary rectifier distributor or
Burned ZNR our office
Burned generator wiring
Low speed Increase
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