troubleshooting (ENGINE)
Table 6. Engine Troubleshooting
Symptom | Possible Cause | Solution | |
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| Spark plug bridging? | Check gap, insulation or replace spark plug. | |
Difficult to start. Fuel is | Carbon deposit on spark plug? | Clean or replace spark plug. | |
available but no SPARK | Short circuit due to deficient spark plug | Check spark plug insulation. Replace if | |
at spark plug. | insulation? | worn. | |
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| Improper spark plug gap? | Set to proper gap. | |
| ON/OFF switch is shorted? | Check switch wiring. Replace switch. | |
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Difficult to start. Fuel is | Ignition coil defective? | Replace ignition coil. | |
available and SPARK | Improper spark gap, points dirty? | Set correct spark gap and clean points. | |
is present at the spark |
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| |
Condenser insulation worn or short | Replace condenser. | ||
plug. | |||
circuiting? | |||
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| Spark plug wire broken or short circuiting? | Replace defective spark plug wiring. | |
Difficult to start. Fuel | Wrong fuel type? | Flush fuel system and replace with correct | |
is available, SPARK is | type of fuel. | ||
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present at the spark |
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Water or dust in fuel system? | Flush fuel system. | ||
plug and compression | |||
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Air cleaner dirty? | Clean or replace air cleaner. | ||
is normal. | |||
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| Suction/exhaust valve stuck or protruded? | Reseat valves. | |
Difficult to start. Fuel |
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| |
Piston ring and/or cylinder worn? | Replace piston rings or piston. | ||
is available, SPARK is | |||
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Cylinder head and/or spark plug not |
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present at the spark | Torque cylinder head bolts and spark plug. | ||
tightened properly? | |||
plug and compression |
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is low. | Head gasket and/or spark plug gasket | Replace head and spark plug gaskets. | |
| damaged? | ||
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| Fuel not available in fuel tank? | Fill with correct type of fuel. | |
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| Fuel cock does not open properly? | Apply lubricant to loosen fuel cock lever. | |
No fuel present at | Replace if necessary. | ||
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carburetor. | Fuel filter clogged? | Replace fuel filter. | |
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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 | |
Weak in power. | Air cleaner dirty? | Clean or replace air cleaner. | |
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Compression is proper | Improper level in carburetor? | Check float adjustment. Rebuild carburetor. | |
and does not misfire. |
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Defective spark plug? | Clean or replace spark plug. | ||
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page 30 — GAC9.7HZ 60 hz gENERATOR• operation and parts manual — rev. #2 (03/31/10)
