| Problem |
Possible Cause |
Correction |
| Won't start or run |
Foreign debris in muffler
No Gas
Spark plug not connected
No Oil |
Check and clean muffler exhaust
Add gas to tank. Turn fuel valve on.
Connect spark plug wire
Check and add oil |
| Alternator Excitation Failure |
Low speed
Faulty capacitor
Faulty Windings |
Check rpm and set at nominal value
Check and replace
Check windings resistance |
| High no-load voltage |
Speed to High
Capacitor with high capacity |
Check and adjust rpm
Check and replace |
| Low no-load voltage |
Speed to low
Faulty rotary diodes
Breakdown in windings
Capacitor with low capacity |
Check and adjust rpm
Check and replace
Check winding resistance
Check and replace |
| Proper no-load but low loaded voltage |
Low loaded speed
Load too big
Capacitor with low capacity |
Check and replace
Check winding resistance
Check and replace |
| Proper no-load but high loaded voltage |
High speed in load condition |
Check and regulate rpm |
| Unstable voltage |
Loose contacts
Change in engine speed |
Check connections
Check and regulate rpm |
| Tank Expansion |
|
Fuel cap not venting |
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