Troubleshooting Guide (continued)
ADDITIONAL PROBLEMS
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| Clogged air filter. |
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| Clean the air filter. | ||
Poor acceleration. | ||||||||
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| Clogged fuel filter. |
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| Replace the fuel filter. | |||
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| Lean fuel/air mixture. |
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| Consult with an authorized servicing dealer. | ||
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| Idle speed set too low. |
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| Adjust: 3,000 (±300) RPM | ||
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| Switch turned off. |
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| Reset the switch and restart. | ||
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Engine stops abruptly. |
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| Fuel tank empty. |
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| Refuel. See page 7. | ||
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| Clogged fuel filter. |
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| Replace fuel filter. | ||
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| Water in the fuel. |
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| Drain; replace with clean fuel. See page 7. | ||
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| Shorted spark plug or loose terminal. |
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| Clean and replace spark plug, tighten | ||
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| the terminal. | |
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| Ignition failure. |
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| Replace the ignition unit. | ||
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| Piston seizure. |
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| Consult with an authorized servicing dealer. | ||
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| Ground (stop) wire is disconnected or |
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| Test and replace as required. | ||
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Engine difficult to shut off. |
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| switch is defective. |
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| Overheating due to incorrect spark plug. |
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| Idle engine until cool. | ||
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| Clean and regap the plug to 0.024 - 0.028 | |
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| inch (0.6 - 0.7 mm). Correct plug: NGK CMR5H | |
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| or equivalent resistor type spark plug of the | |
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| correct range. | |
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| Overheated engine. |
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| Idle engine until cool. | ||
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| Valve cover is leaking. |
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| Consult with an authorized servicing dealer. | ||
Top of engine is getting |
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dirty and oily. |
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| Engine idle too high. |
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| Set idle: 3,000 (±300) RPM | ||
Cutting attachment |
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rotates at engine idle. |
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| Broken clutch spring or worn clutch |
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| Replace spring/shoes as required, check | ||
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| spring boss. |
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| idle speed. | ||
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| Loose attachment holder. |
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| Inspect and | ||
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| Engine idle set too high. |
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| Set idle: 3,000 (±300) RPM | ||
Engine will not idle down. |
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| Engine has an air leak. |
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| Consult with an authorized servicing dealer. | |||
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Symptom
Excessive vibration.
ADDITIONAL PROBLEMS
Possible Cause |
| Remedy |
Warped or damaged cutting attachment. |
| Inspect and replace attachment as required. |
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Loose gearcase. |
| Tighten gearcase securely. |
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Bent main shaft/worn or damaged |
| Inspect and replace as necessary. |
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liner. |
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Cutting attachment will not rotate.
Shaft not installed in powerhead or gearcase.
Broken shaft.
Damaged gearcase.
Inspect and reinstall as required.
Consult with an authorized servicing dealer.
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