Troubleshooting Guide (continued)
ADDITIONAL PROBLEMS
Symptom |
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| Possible Cause |
| Remedy |
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| Clogged air filter. |
| Clean 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: 3,000 ( | 250) RPM |
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| Switch turned off. |
| Reset the switch and and restart. | ||||
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Engine stops abruptly. |
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| Fuel tank empty. |
| Refuel. See page 10. | |||||
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| Clogged fuel filter. |
| Replace fuel filter. | ||||
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| Water in fuel. |
| Drain; replace with clean fuel. See page 10. | ||||
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| Shorted spark plug or loose terminal. |
| Clean and replace spark plug, tighten the 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 or |
| 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. |
| 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 BPMR6A | ||||
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| or equivalent resistor type spark plug of the | ||||
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| correct range. |
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| Overheated engine. |
| Idle engine until cool. |
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| Engine idle too high. |
| Set Idle: 3,000 ( | 250) RPM | |||
Cutting attachment rotates |
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at idle. |
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| Broken clutch spring or worn clutch |
| Replace spring/shoes as required, check | ||||
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| spring boss. |
| idle speed. |
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| Loose attachment holder. |
| Inspect and | ||||
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| Engine idle set too high. |
| Set Idle: 3,000 ( | 250) RPM | |||
Engine will not idle down. |
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| Engine has an air leak. |
| Consult with an authorized servicing dealer. | |||||
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ADDITIONAL PROBLEMS
| Symptom |
| Possible Cause |
| Remedy |
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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 |
| Inspect and replace as necessary. |
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| bushings. |
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| Trimmer line not wound properly on spool. |
| Rewind trimmer line. |
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| Shaft not installed in powerhead or |
| Inspect and reinstall as required. |
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| Cutting attachment will |
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| gearcase. |
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| not rotate. |
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| Broken shaft. |
| Consult with an authorized servicing dealer. |
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| Damaged gearcase. |
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19
