Homelite UT20818A manual Troubleshooting, Speed. See Figure

Page 14

TROUBLESHOOTING

PROBLEM

POSSIBLE CAUSE

SOLUTION

 

 

 

 

 

 

Engine will not start:

1.

No spark.

1.

To check for spark: Disconnect the spark plug

 

 

 

 

wire. Reattach the spark plug wire 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.

 

2.

No fuel.

2.

Push primer bulb until bulb is full of fuel. If

 

 

 

 

bulb does not fill, primary fuel delivery system

 

 

 

 

is blocked. Contact a service dealer. If primer

 

 

 

 

bulb fills, engine may be flooded (see next

 

 

 

 

item).

 

3.

Flooded engine.

3.

Remove spark plug, turn trimmer so spark plug

 

 

 

 

hole is aimed at the ground. Move choke lever

 

 

 

 

to “RUN” 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 lever at “RUN”. If engine

 

 

 

 

does not start, move choke lever to “CHOKE”

 

 

 

 

and repeat normal starting procedure. If engine

 

 

 

 

still fails to start, repeat procedure with a new

 

 

 

 

spark plug.

 

4.

Starter rope pulls harder now than

4.

Contact a service dealer.

 

 

when new.

 

 

 

 

 

 

Engine starts but will not

Carburetor requires adjustment.

Contact a service dealer.

accelerate:

 

 

 

 

 

 

 

 

Engine starts but will only

Carburetor requires adjustment.

Turn mixture needle counterclockwise 1/16 turn.

run at high speed at half

 

 

See Figure 18.

choke:

 

 

 

 

 

 

 

 

 

 

Engine does not reach full

1.

Check oil fuel mixture.

1.

Use fresh fuel and the correct 2-cycle oil mix.

speed and emits excessive

2.

Air filter dirty.

2.

Clean air filter. Refer to “Replacing and

smoke:

 

 

 

Cleaning Air Filter” earlier in this manual.

 

3.

Carburetor requires adjustment.

3.

Turn mixture needle clockwise 1/16 turn. See

 

 

 

 

Figure 18.

 

 

 

Engine starts, runs, and

Carburetor requires adjustment.

Turn idle speed screw clockwise to increase idle

accelerates but will not

 

 

speed. See Figure 18.

idle:

 

 

 

 

 

 

 

 

 

 

String will not advance:

1.

String welded to itself.

1.

Lubricate with silicone spray.

 

2.

Not enough string on spool.

2.

Install more string. Refer to “String Replace-

 

 

 

 

ment” earlier in this manual.

 

3.

String worn too short.

3.

Pull strings while alternately pressing down on

 

 

 

 

and releasing spool retainer.

 

4.

String tangled on spool.

4.

Remove string from spool and rewind. Refer to

 

 

 

 

“String Replacement” earlier in this manual.

 

5.

Engine speed too slow.

5.

Advance string at full throttle.

 

 

 

 

 

 

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Contents Operators Manual Introduction Table of ContentsImportant Safety Instructions Specific Safety Rules for Trimmer USE Symbols Symbol Name ExplanationUnpacking SpecificationsFeatures InstructionsRemoving the Attachment from the Power Head AssemblyAttaching the Power Head to the Trimmer Attachment Attaching the Storage HangerHandle Grass DeflectorFuel Mixture Fueling and Refueling the TrimmerOperating the Trimmer Fuel Mixture Premium Exact MIX Gasoline OILCUT OFF Blade OperationAdvancing the String Cutting TipsTo Start a Cold Engine Starting and StoppingSee To Start a Warm EngineNEW Prewound Spool MaintenanceSpool Replacement EZ Line TAP Advance System See Figures 10See Figures 12, 13, 14, String ReplacementCleaning the Exhaust Port and Muffler Spark Arrestor Arrows on Spool Anchor Hole First StringSpark Plug Replacing and Cleaning AIR FilterFuel CAP Storing the Trimmer 1 Month or LongerTroubleshooting Speed. See FigureIdle Speed Screw Mixture Needle Warranty Limited Warranty StatementManufacturers Warranty Coverage AIR Filter Assy Optional Muffler Guard Service PartsDescription Service Repair Parts California Proposition

UT20818A specifications

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