Troubleshooting - Yamaha YP20G Owner's Manual

AE00511

TROUBLESHOOTING

AE00512
Engine won't start
1. Fuel systems
No fuel supplied to combustion chamber.
707-041
2 No fuel in tank .... Supply fuel.
2 Clogged fuel line .... Clean fuel line.
2 Foreign matter in fuel cock .... Clean fuel cock.
2 Clogged carburetor .... Clean carburetor.
705-037
2. Engine oil system
Insufficient
2 Oil level is low .... Add engine oil.
700-006
3. Electrical systems
2 Engine switch to "ON".
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.
760-009
CE00512
Water does not draw up
2 Loosened priming and/or drain plugs .... Tighten.
2 Loosened hose joint and/or band .... Tighten.
2 Damaged O-ring and/or gaskets .... Replace
2 Damaged mechanical seal .... Consult dealer.
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