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Maintenance
5
Section
11
ADJUSTING TRIMMER
HEAD ENGAGEMENT
The tension on the drive belt must be
correct for proper operation of the
trimmer head. If the tension is correct,
the trimmer head will rotate when the
Trimmer Head Control Bail is pulled back
against the handlebar (another indication
of correct tension is if the engine stalls
when the trimmer head becomes bound
up in very tough material.)
A worn or loose drive belt will slip on its
pulleys, causing the trimmer head to
move slowly, or not at all, when the con-
trol bail is engaged (belt squealing may
also be noticeable).
If the tension is too tight, the trimmer
head may rotate before the control bail is
engaged, or when there is no free play in
the control bail.
TO ADJUST BELT TENSION
1. Stop the engine and wait for all parts
to stop moving. Adjust the position of
the two nuts on the control cable adjust-
ment stud (see Figure 5-2) as described
next:
a. To tighten belt tension, move the
upper nut (A, Figure 5-2) upward, then
move the lower nut (B) upward.
Tighten both nuts securely.
b. To loosen belt tension, move the
lower nut (B, Figure 5-2) down and
then the upper nut (A) down. Tighten
both nuts securely.
REQUIRED MAINTENANCE SCHEDULE
BEFORE EVERY EVERY EVERY AS
REQUIRED MAINTENANCE EACH 5 25 100 NOTED
USE HOURS HOURS HOURS
CHECK ENGINE OIL LEVEL ••
CHECK TRIMMER/MOWER LINES • 1
CHECK TRIMMER HEAD ENGAGEMENT •
ENGINE/MACHINE CLEANING • 3
CHECK NUTS AND BOLTS •
CHANGE ENGINE OIL • 2, 5
SERVICE AIR FILTER SYSTEM • 5
CLEAN UNDER DECK •
GENERAL LUBRICATION •
INSPECT DRIVE BELT •
CLEAN ENGINE • 4
CHECK WEAR CUP • 6
NOTE 1 – New line replacement is suggested when old line is 50% or less of original length.
NOTE 2 – Change oil after first two hours of new operation; thereafter every 25 hours.
NOTE 3 – Clean daily if used in extremely dusty/dirty conditions (see Engine Owner’s Manual).
NOTE 4 – Clean before using machine and at each fuel refill.
NOTE 5 – Service more often if used in extremely dusty or dirty conditions (see Engine
Owner’s Manual).
NOTE 6 – Replace when severe gouges exist on bottom surface.
Chart 5-1
Before inspecting, cleaning or servicing the machine, shut off engine, discon-
nect spark plug wire, and make sure that all moving parts have come to a com-
plete stop. Remove ignition key on electric start models.
Failure to follow these instructions can result in personal injury or property
damage.
WARNING
NOTE: LEFT and RIGHT sides of unit are as viewed
from operator’s position behind the handlebars.
Figure 5-2: Belt tension adjustment.
B
A