DR Power Walk-Behind Pro (1985 - 2000) - Manual (Page 38)

36 DR
®
TRIMMER/MOWER
™
Assembly & Operating Instructions
Engine lacks power or is not running smoothly
(continued)
(Please refer to the engine manufacturer's owner's
manual for engine-specific procedures.)
Þ Is the air filter clean? If it’s dirty, change it
following the procedure in the engine
manufacturer's owner's manual.
Þ Is the throttle cable attached to the engine and
moving freely?
Þ Are the blower housing, throttle linkage and
cooling fins free of debris? Clean them following
the instructions in the engine manufacturer's
owner's manual.
Þ Are the bearing housing and trimmer head
clogged with debris? Drop it and clean it
according to the To Partially Lower the Bearing
Housing Assembly instructions in the
maintenance section of this manual.
Þ If your engine still lacks power, call 1(800)DR-
OWNER(376-9637) for advice and assistance.
Grass is wrapping on trimmer shaft, bearing housing
and/or trimmer head Þ Lift the Mow-Ball ™
Support slightly off the ground
by pushing down on the handlebar and back the
machine up. This should help clear the debris.
You can also turn the engine off, disconnect the
spark plug and pull out any remaining material
with your hands, or use a knife to cut it away.
Þ Are you trying to do too much too fast? Check
the tips in the section on breaking cords below.
Þ Any time you have to pull or cut away wrapped
vegetation, turn off the DR
®
and disconnect
the spark plug wire.
Trimmer head won't spin Þ Is the trimmer head control fully engaged? Pull
the brake bar all the way back to the handlebars,
then firmly push the trimmer head control lever all
the way down until you hear a click. When you
release it, it will spring part way back. The head
will keep spinning as long as you hold back the
brake bar.
Þ Is your v-belt properly aligned? Check it against
the diagram in the Belt section of this manual.
Make sure the belt is inside the idler pulley, that
the springs on the idler pulley arm and triangular
brake actuator are in place, and that the actuator
moves when you engage the trimmer head
control lever.
Þ Is your v-belt worn or frayed? If so, replace it.
Þ Are your bearings in good shape? Follow the To
Check the Bearing Housing Assembly
instructions in the maintenance section of this
manual.
Þ Are the bearing housing and trimmer head
clogged with debris? Drop and clean them
according to the To Partially Lower the Bearing
Housing Assembly instructions in the
maintenance section of this manual.