Homelite UT21546, UT21506, UT21947, UT21907 manual Troubleshooting, Air Filter Screen earlier in this

Page 16

TROUBLESHOOTING

Problem

Possible Cause

Solution

Engine will not start.

No spark.

Check spark. Remove spark plug. Re-

 

 

attach the spark plug cap and lay spark

 

 

plug on metal cylinder. Pull the starter

 

 

rope and watch for spark at spark plug

 

 

tip. If there is no spark, repeat test with

 

 

a new spark plug.

 

No fuel.

Push primer bulb until bulb is full of

 

 

fuel. If bulb does not fill, primary fuel

 

 

delivery system is blocked. Contact

 

 

a servicing dealer. If primer bulb fills,

 

 

engine may be flooded, proceed to

 

 

next item.

 

Engine is flooded.

Remove spark plug, turn trimmer so

 

 

spark plug hole is aimed at the ground.

 

 

Rotate the choke dial to “RUN” posi-

 

 

tion and pull starter cord 10 to 15

 

 

times. This will clear excess fuel from

 

 

engine. Clean and reinstall spark plug.

 

 

Pull starter three times with choke dial

 

 

at “RUN”. If engine does not start,

 

 

rotate choke dial to “FULL CHOKE”

 

 

position and repeat normal starting

 

 

procedure. If engine still fails to start,

 

 

repeat procedure with a new spark

 

 

plug.

 

Starter rope pulls harder now than

Contact a servicing dealer.

 

when new.

 

 

 

 

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

 

 

minutes, contact a servicing dealer.

 

 

 

Engine starts but will only run at high

Carburetor requires adjustment.

Contact a servicing dealer.

speed at half choke.

 

 

 

 

 

Engine does not reach full speed and

Check lubricant fuel mixture.

Use fresh fuel and the correct 2-cycle

emits excessive smoke.

 

lubricant mix.

 

Air filter is dirty.

Clean air filter. Refer to Cleaning

 

 

the Air Filter Screen earlier in this

 

 

manual.

 

Carburetor out of adjustment.

Contact a servicing dealer.

 

 

 

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 19.

 

 

 

Page 16

Image 16
Contents Save this Manual for Future Reference ALL VersionsMightyLite 26CS MightyLite 26SSTable of Contents IntroductionSpecific Safety Rules General Safety RulesRead all instructions Symbols Symbol Name ExplanationService Symbol Signal MeaningFeatures Product SpecificationsKnow Your String Trimmer EZ Wind TAP Advance SystemGrass Deflector TOP-MOUNTED MotorAssembly String Head AssemblyUnpacking Packing ListCurved shaft Grass Deflector mightylite 26cs Straight shaft Grass Deflector mightylite 26ss26CS Pull strings to SecureOperation Fueling and Refueling the trimmerFuel Mixture Filling TankStarting and Stopping To Stop the EngineIf assistance is required Starting this product Operating the TrimmerAdvancing String Using the EZ wind Tap Advance System Cutting TipsAdvancing the String Manually CUT-OFF BladeMaintenance General MaintenanceSpool Replacement EZ wind Tap Advance SystemString Replacement Cleaning the Exhaust PortSpark Arrestor See Figures 13Cleaning the AIR Filter Screen Fuel CAPSpark Plug STORing the trimmerTroubleshooting Air Filter Screen earlier in thisSlow Fast Idle speed ScrewWarranty Limited Warranty StatementYour Warranty Rights and Obligations Emissions Parts Inspect Before Clean Every Clean Every Replace Every Each Use Hours Every 25 HoursThis product was manufactured with a catalyst muffler IncludesPage Parts and Service California Proposition