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| TROUBLE | POSSIBLE CAUSE | REMEDY | PAGE | ||
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Engine runs irregu- | Fuel | Empty | Refill as soon as possi- | |||
larly or stalls |
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| Stale or contaminated | Have serviced by | |
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| Yamaha dealer | |
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| Choke | Knob pulled | Push fully in | |
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| Fuel filter | Clogged or water | Have serviced by | |
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| Fuel tank | Water or dirt present | Have serviced by | |
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| Yamaha dealer | |
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| Spark plug | Fouled or defective | Replace | |
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| Incorrect heat range | Replace | |
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| Gap incorrect | Adjust | |
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| Spark plug cap | Loose | Connect properly | |
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| Cracked, torn, or dam- | Replace | — |
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| Electrical wir- | Loose connection | Tighten or connect | — |
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| Carburetor | Incorrect idle adjust- | Adjust idle | |
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| Clogged | Have serviced by | — |
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Warning light or | Fuel level | Empty | Refill as soon as possi- | |||
indicator blinks |
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| Engine oil level | Empty | Refill immediately | |
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| Oil filter clogged | Clean | |
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| Engine over- | Jet intake clogged | Clean | |
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| heated |
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| Low battery | Battery voltage low | Charge | |
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| voltage |
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| Battery terminal con- | Connect properly | ||
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| nected wrong |
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