Troubleshooting - Yamaha EF4000DE - Premium Generator Owner's Manual

707-001
1 705-037a
700-006
1
763-127a
791-001d

TROUBLESHOOTING

Engine won't start
1. Fuel systems
No fuel supplied to combustion chamber.
2 No fuel in tank .... Supply fuel.
2 Fuel in tank .... Fuel cock lever to "ON".
1 "ON"
2 Clogged fuel line .... Clean fuel line.
2 Foreign matter in fuel cock .... Clean fuel cock.
2 Clogged carburetor .... Clean carburetor.
2. Engine oil system
Insufficient
2 Oil level is low .... Add engine oil.
3. Electrical systems
2 Engine switch to "
1 7 "ON"
Poor spark
2 Spark plug dirty with carbon or wet .... Remove
carbon or wipe spark plug dry.
2 Faulty ignition system .... Consult a Yamaha deal-
er.
Generator won't produce power
2 Safety device (AC switch) to "OFF"····Turn the AC
switch (N.F.B.) to "ON".
– 40 –
".
ON