Homelite UT21506, UT21546, UT21947, UT21907 manual Slow, Fast Idle speed Screw

Page 17

TROUBLESHOOTING

Problem

Possible Cause

Solution

String will not advance.

String is welded to itself.

Lubricate with silicone spray.

 

Not enough string on spool.

Install more string. Refer to String

 

 

­Replacement earlier in this manual.

 

String is worn too short.

Pull strings while alternately pressing

 

 

down on and releasing spool retainer.

 

String is tangled on spool.

Remove string from spool and rewind.

 

 

Refer to String Replacement earlier in

 

 

this manual.

 

Engine speed is too slow.

Advance string at full throttle.

Spool retainer hard to turn.

Screw threads are dirty or damaged.

Clean threads and lubricate with

 

 

grease – if no improvement, replace

 

 

the spool retainer.

Grass wraps around driveshaft housing

Cutting tall grass at ground level.

Cut tall grass from the top down to

and string head.

 

prevent wrapping.

 

Operating trimmer at part throttle.

Operate trimmer at full throttle.

Lubricant drips from muffler.

Operating trimmer at part throttle.

Operate trimmer at full throttle.

 

Check lubricant/fuel mixture.

Use fresh fuel and the correct 2-cycle

 

 

lubricant mix.

 

Air filter dirty.

Clean air filter. Refer to Cleaning

 

 

the Air Filter Screen earlier in this

 

 

manual.

 

 

slow

fast

idle speed

screw

Fig. 19

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Image 17
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Contents ALL Versions Save this Manual for Future ReferenceMightyLite 26CS MightyLite 26SSIntroduction Table of ContentsRead all instructions General Safety RulesSpecific Safety Rules Symbol Name Explanation SymbolsSymbol Signal Meaning ServiceProduct Specifications FeaturesEZ Wind TAP Advance System Know Your String TrimmerGrass Deflector TOP-MOUNTED MotorString Head Assembly AssemblyUnpacking Packing ListStraight shaft Grass Deflector mightylite 26ss Curved shaft Grass Deflector mightylite 26cs26CS Pull strings to SecureFueling and Refueling the trimmer OperationFuel Mixture Filling TankTo Stop the Engine Starting and StoppingIf assistance is required Starting this product Operating the TrimmerCutting Tips Advancing String Using the EZ wind Tap Advance SystemAdvancing the String Manually CUT-OFF BladeGeneral Maintenance MaintenanceSpool Replacement EZ wind Tap Advance SystemCleaning the Exhaust Port String ReplacementSpark Arrestor See Figures 13Fuel CAP Cleaning the AIR Filter ScreenSpark Plug STORing the trimmerAir Filter Screen earlier in this TroubleshootingFast Idle speed Screw SlowLimited Warranty Statement WarrantyYour Warranty Rights and Obligations Clean Every Replace Every Each Use Hours Every 25 Hours Emissions Parts Inspect Before Clean EveryThis product was manufactured with a catalyst muffler IncludesPage California Proposition Parts and Service
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