Yamaha EF4500iSE Owners Manual - Page 39
TROUBLESHOOTING, Engine won, t start
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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 -