Homelite UT70121 - Manual (Page 16)

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NOTE: The carburettor adjustment needle(s) are equipped
with plastic cap(s) which prevent anticlockwise rotation
from the original factory adjustment. If your unit exhibits
specific performance problem(s) where the Trouble Shoot-
ing Section recommends a anticlockwise needle adjust-
ment and no adjustments have been made since original
purchase, the unit should be taken to a factory-authorised
service dealer for repair. In most cases, the needed
adjustment is a simple task for the factory-trained service
representative.
PROBLEM PROBLEM PROBLEM PROBLEM PROBLEM POSSIBLE CAUSE POSSIBLE CAUSE POSSIBLE CAUSE POSSIBLE CAUSE POSSIBLE CAUSE SOLUTION SOLUTION SOLUTION SOLUTION SOLUTION
IF THESE SOLUTIONS DO NOT SOLVE THE PROBLEM, CONTACT YOUR AUTHORISED SERVICE DEALER.
1. Cut tall grass from the top down.
2. Operate trimmer at full throttle.
Clean threads and lubricate with grease - if no improve-
ment, replace spool retainer.
1. Operate trimmer at full throttle.
2. Use fresh fuel and the correct 2-cycle oil mix.
3. Clean air filter. Refer to “Replacing and Cleaning Air
Filter” earlier in this manual.
4. Turn mixture needle clockwise 1/16 turn.
See Figure 18.
1. Cutting tall grass at
ground level.
2. Operating trimmer at
part throttle.
Screw threads dirty or damaged.
1. Operating trimmer at
part throttle.
2. Check oil/fuel mixture.
3. Air filter dirty.
4. Carburettor requires
adjustment.
Grass wraps round drive
shaft housing and string
head:
Spool retainer hard to
turn:
Oil drips from silencer:
TROUBLESHOOTING
MIXTURE
NEEDLE
IDLE SPEED
SCREW
Fig. 18