TROUBLESHOOTING
Problem | Possible Cause | Solution |
Engine starts but will not accelerate. | Engine requires approximately three | Allow engine to completely warm up. If |
| minutes to warm up. | engine does not accelerate after three |
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| minutes, contact a servicing dealer. |
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Engine starts but will only run at high | Carburetor requires adjustment. | Contact an authorized servicing |
speed at half choke. |
| dealer. |
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Engine does not reach full speed and | Check lubricant fuel mixture. | Use fresh fuel and the correct |
emits excessive smoke. |
| lubricant mix. |
| Air filter is dirty. | Clean air filter. Refer to Cleaning |
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| the Air Filter Screen earlier in this |
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| manual. |
| Carburetor out of adjustment. | Contact an authorized servicing |
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| dealer. |
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Engine starts, runs, and accelerates | Idle speed screw on carburetor needs | Turn idle speed screw clockwise to |
but will not idle. | adjustment. | increase idle speed. See figure 16. |
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String will not advance. | String is welded to itself. | Lubricate with silicone spray. |
| Not enough string on spool. | Install more string. Refer to String |
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| Replacement earlier in this manual. |
| String is worn too short. | Pull strings while alternately pressing |
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| down on and releasing spool retainer. |
| String is tangled on spool. | Remove string from spool and rewind. |
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| Refer to String Replacement earlier in |
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| this manual. |
| Engine speed is too slow. | Advance string at full throttle. |
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Spool retainer hard to turn. | Screw threads are dirty or damaged. | Clean threads and lubricate with |
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| grease – if no improvement, replace |
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| the spool retainer. |
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Grass wraps around drive shaft hous- | Cutting tall grass at ground level. | Cut tall grass from the top down to |
ing and string head. |
| prevent wrapping. |
| Operating trimmer at part throttle. | Operate trimmer at full throttle. |
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Lubricant drips from muffler. | Operating trimmer at part throttle. | Operate trimmer at full throttle. |
| Check lubricant/fuel mixture. | Use fresh fuel and the correct |
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| lubricant mix. |
| Air filter screen dirty. | Clean air filter. Refer to Cleaning |
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| the Air Filter Screen earlier in this |
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| manual. |
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