Yamaha EF4500iSE Owners Manual - Page 39

TROUBLESHOOTING, Engine won, t start

Page 39 highlights

AE00512 TROUBLESHOOTING ON OFF Engine won't start 1. Fuel systems No fuel supplied to combustion chamber. 707-7XFc 2 No fuel in tank .... Supply fuel. 2 Fuel in tank .... Fuel cock knob to "ON". 2 Clogged fuel line .... Clean fuel line. 2 Clogged carburetor .... Clean carburetor. 705-073c 2. Engine oil system Insufficient 2 Oil level is low .... Add engine oil. 700-006 q 763-120a 760-009 3. Electrical systems 2 Engine switch to "START" 1. Poor spark 2 Spark plug dirty with carbon or wet .... Remove carbon or wipe spark plug dry. 2 Faulty ignition system .... Consult dealer. 4. Compression Insufficient 2 Worn out piston and cylinder .... Consult dealer. 2 Loose cylinder head nuts .... Tighten nuts proper- ly. 2 Damaged gasket .... Replace gasket. - 34 -

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34
707-7XFc
705-073c
ON
OFF
700-006
760-009
AE00512
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 knob to
ON
.
2
Clogged fuel line
....
Clean fuel line.
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
START
1
.
Poor spark
2
Spark plug dirty with carbon or wet
....
Remove
carbon or wipe spark plug dry.
2
Faulty ignition system
....
Consult dealer.
4. Compression
Insufficient
2
Worn out piston and cylinder
....
Consult dealer.
2
Loose cylinder head nuts
....
Tighten nuts proper-
ly.
2
Damaged gasket
....
Replace gasket.
763-120a
q