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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.
A loose or worn drive belt will cause the
trimmer head to move slowly, or not at
all, when the control bail is engaged (belt
squealing may also be noticeable).
If the belt tension is too tight, the
trimmer head may rotate before the con-
trol 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 jam nuts on the control cable
adjustment stud (see Figure 5-2) as
described next:
a. To tighten belt tension, move the
upper nut (A, Figure 5-2) upward one
or two full turns, then move the lower
nut (B) upward. Tighten both nuts
securely. Test unit and readjust jam
nuts as needed.
b. To loosen belt tension, move the
lower nut (B, Figure 5-2) downward
one or two full turns and then move
the upper nut (A) down. Tighten both
nuts securely. Test unit and readjust
jam nuts as needed.
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 LINES • 1
CHECK TRIMMER HEAD ENGAGEMENT •
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 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
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