CONTACT US AT www.DRpower.com 27
Before adjusting the trimmer control cable, check that the belt mounting is on the correct side of the idler pulleys (see
Figure 35
on page 22), and not frayed, worn or stretched. Also make sure the spring is attached to the bail bar (Figure 49).
If the machine will not drive forward:
Grasp the Lower Section of the Cable Adjuster with one hand and hold firmly. Turn the Upper Section of the Cable Adjuster
clockwise so that the Adjuster is lengthening or turning apart. Make one revolution of the Adjuster at a time until the drive
engages and disengages properly (Figure 48).
If the machine creeps ahead or “walks”:
Grasp the Lower Section of the Cable Adjuster with one hand and hold firmly. Turn the Upper Section of the Cable
Adjuster counterclockwise so that the Adjuster is shortening or turning together. Make one revolution of the Adjuster
at a time until the drive engages and disengages properly (
Figure 48).
Adjusting the Trimmer Head Belt Tension through the Trimmer Control Cable - All models
If the Trimmer Head stops spinning with the Bail Bar engaged and the machine
is operating under a heavy load, the Belt may be too loose. In this case, you
may need to adjust the Trimmer Control Cable to put more tension on it. The
Adjuster is located on the right Handlebar, just above the Throttle Control Lever
for the SPRINT, PRO, and COMMERCIAL models and on the left Handlebar
for the SELF-PROPELLED model.
Tools needed:
Two 1/2" Open-end or Adjustable Wrenches
To increase the tension on the belt:
1. Loosen the upper Control Cable Adjustment Nut, leaving about 1/8" of
space between the Nut and Bracket
(Figure 49).
2. Gently pull down on the Cable as you tighten the lower Nut until it is flush
and snug against the Bracket.
NOTE: If the Trimmer Head still keeps spinning after releasing the Bail Bar, the
Belt may be too tight or the Brake Arm may need replacing. See “Brake Arm” on page 23.
To decrease the tension on the belt:
1. Repeat the steps for increasing the tension on the Belt, but instead, loosen the Lower
Nut first and then tighten the Upper Nut.
NOTE: To check your adjustment, measure the Spring with the Bail Bar disengaged. Then
measure it with the Bail Bar engaged. There should be a 1/4" extension in the Spring when
the Bail Bar is engaged (Figure 50). Adjust the Nuts on the Bracket as needed to get the
correct measurements.
Before performing any adjustment, maintenance procedure or inspection, stop the engine, wait five (5) minutes to allow parts to
cool and disconnect the spark plug wire, keeping it away from the spark plug.
Bail Bar
Spring
Upper Nut
Bracket
Lower Nut
Metal Cable End
O-Ring
Figure 49
Measure the Bail Bar released
With Bail Bar engaged, should be 1/4" longer
Figure 50
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