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 (5300) 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 8. | |||
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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 8. | ||
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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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| Warped or damaged cutting attachment. |
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| Inspect and replace attachment as required. | |||
Excessive vibration. |
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| Loose gearcase. |
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| Tighten gearcase securely. | ||||
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| Bent main shaft/worn or damaged |
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| 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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Cutting attachment will not move.
Shaft not installed in powerhead or |
| Inspect and reinstall as required. |
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gearcase. |
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Broken shaft. |
| Consult with an authorized servicing dealer. |
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Damaged gearcase. |
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