TROUBLESHOOTING (ENGINE)
TABLE 5. TROUBLESHOOTING (ENGINE)
| SYMPTOM | POSSIBLE CAUSE | SOLUTION |
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| Spark plug bridging? | Check gap, insulation or |
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| replace spark plug. |
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| Difficult to start, "fuel is available, but no | Carbon deposit on spark plug? | Clean or replace spark plug. |
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| SPARK at spark plug". | Short circuit due to deficient spark plug | Check spark plug insulation, |
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| insulation? | replace if worn. |
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| Improper spark plug gap? | Set to proper gap. |
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| ON/OFF switch is shorted? | Check switch wiring, replace |
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| switch. |
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| Ignition coil defective? | Replace ignition coil. |
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| Difficult to start, "fuel is available, and | Improper spark gap, points dirtry? | Set correct spark gap and |
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| clean points. |
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| SPARK is present at the spark plug". |
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| Condenser insulation worn or short | Replace condenser. |
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| circuiting? |
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| Spark plug wire broken or short circuiting? | Replace defective spark plug |
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| wiring. |
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| Wrong fuel type? | Flush fuel system, and replace |
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| with correct type of fuel. |
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| Difficult to start, "fuel is available, spark | Water or dust in fuel system? | Flush fuel system. |
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| is present and compression is normal" |
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| Air cleaner dirty? | Clean or replace air cleaner. |
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| Choke Open? | Close Choke. |
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| Suction/exhaust valve stuck or protruded? |
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| Piston ring and/or cylinder worn? | Replace piston rings and or |
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| piston. |
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| Difficult to start, "fuel is available, spark |
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| is present and compression is low" | Cylinder head and/or spark plug not | Torque cylinder head bolts and |
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| tightened properly? | spark plug. |
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| Head gasket and/or spark plug gasket | Replace head and spark plug |
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| damaged? | gaskets. |
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| Fuel not available in fuel tank? | Fill with correct type of fuel. |
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| Fuel filter clogged? | Replace fuel filter. |
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| No fuel present inside priming bulb. |
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| Fuel tank cap breather hole clogged? | Clean or replace fuel tank cap. |
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| Air in fuel line? | Bleed fuel line. |
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