Troubleshooting Guide (continued)
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| ADDITIONAL PROBLEMS |
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Symptom |
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| Possible Cause |
| Remedy |
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| Clogged air filter. |
| Clean or replace the air filter. |
Poor acceleration. |
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| Clogged fuel filter. |
| Replace the fuel filter. | |
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| Lean fuel/air mixture. |
| Consult with an authorized servicing dealer. |
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| Idle speed set too low. |
| Adjust: 2,750 (±250) RPM |
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| Switch turned off. |
| Reset the switch and restart. |
Engine stops abruptly. |
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| Fuel tank empty. |
| Refuel. See page 11. | |
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| Clogged fuel strainer. |
| Replace strainer. |
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| Water in the fuel. |
| Drain; replace with clean fuel. See page 11. |
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| Shorted spark plug or loose terminal. |
| Clean or replace spark plug with a Champion CJ8 or |
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| equivalent type spark plug of the correct heat range. |
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| For EMC compliance, use NGK BMR6A. Tighten the |
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| terminal. |
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| Ignition failure. |
| Replace the ignition unit. |
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| Piston seizure. |
| Consult with an authorized servicing dealer. |
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| Ground (stop) wire is disconnected, |
| Test and replace as required. |
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Engine difficult to shut off. |
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| or switch is defective. |
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| Overheating due to incorrect spark plug. |
| Replace spark plug with a Champion CJ8 or equivalent |
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| type spark plug of the correct heat range. For EMC |
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| compliance, use NGK BMR6A. |
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| Overheated engine. |
| Idle engine until cool. |
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| Engine idle too high. |
| Set idle: 2,750 (±250) RPM |
Cutting attachment rotates at |
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| Broken clutch spring or worn clutch spring boss. |
| Replace spring/shoes as required, check idle speed. | |
engine idle. |
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| Loose attachment holder. |
| Inspect and |
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| Warped or damaged cutting attachment. |
| Inspect and replace attachment as required. |
Excessive vibration. |
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| Loose gearcase. |
| Tighten gearcase securely. | |
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| Bent main shaft/worn or damaged bushings. |
| Inspect and replace as necessary. |
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| Shaft not installed in powerhead or gearcase. |
| Inspect and reinstall as required. |
Cutting attachment will |
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| Broken shaft. |
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not rotate. |
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| Consult with an authorized servicing dealer. | |
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| Damaged gearcase. |
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