Homelite UT74121A Bar And Chain Combinations, Troubleshooting, Problem, Possible Cause, Solution

Models: UT74121A

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BAR AND CHAIN COMBINATIONS

BAR AND CHAIN COMBINATIONS

 

Length of Bar

Guide Bar Part Number

Chain Part Number

 

305 mm (12 in.)

UP08695

UP08692

 

356 mm (14 in.)

UP08696

UP08693

 

406 mm (16 in.)

UP08698

UP08694

 

 

 

 

 

 

TROUBLESHOOTING

 

 

 

 

 

 

 

 

 

 

PROBLEM

POSSIBLE CAUSE

SOLUTION

Engine will not start. (Make sure ignition switch is in start position “I”.)

1.No spark.

2.Flooded engine.

1.Check spark. Remove air filter cover. Remove sparking plug from cylinder. Reattach the sparking plug wire and lay sparking plug on top of cylinder with the metal part of plug touching the cylinder. Pull the starter rope and watch for spark at sparking plug tip. If there is no spark, repeat test with a new sparking plug.

2.With the ignition switch off, remove sparking plug. Move choke lever to run position (pushed in com- pletely) and pull starter cord 15 to 20 times. This will clear excess fuel from engine. Clean and reinstall sparking plug. Set ignition switch to run (I) position. Push and fully release primer bulb 7 times. 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 sparking plug.

Engine starts but will not

Carburettor requires “L” (Low jet)

Contact a Homelite service dealer for carburettor

accelerate properly.

adjustment.

adjustment.

 

 

 

Engine starts but will not

Carburettor requires “H” (High jet)

Contact a Homelite service dealer for carburettor

run properly at high

adjustment.

adjustment.

speed.

 

 

 

 

 

 

 

 

 

Engine does not reach

1.

Check oil fuel mixture.

1.

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

full speed and/or emits

2.

Air filter dirty.

2.

Clean air filter. Refer to “Maintenance – Cleaning the

excessive smoke.

 

 

 

Air Filter” earlier in this manual.

 

3.

Spark arrester screen dirty.

3.

Clean spark arrester screen. Refer to “Maintenance

 

 

 

 

– Cleaning the Spark Arresting Silencer” earlier in

 

4.

Carburettor requires “H” (High

 

this manual.

 

 

jet) adjustment.

4.

Contact a Homelite service dealer for carburettor

 

 

 

 

adjustment.

 

 

 

 

 

UK - Page 36

Page 36
Image 36
Homelite UT74121A Bar And Chain Combinations, Troubleshooting, Problem, Possible Cause, Solution, Length of Bar, UK - Page