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135-hour Maintnenace
Ever y 135 hours of operation, remove
and clean the muffler.
WARNING!
Never operate the machine with a
damaged or missing muffler or spark
arrester! Operating with missing or
damaged exhaust components is a fire
hazard and could also damage your
hearing.
1. Remove the spark plug boot.
. Loosen the two 4 mm engine cover
screws (located at the top of the recoil
housing).
3. Loosen the 5 mm engine top cover
screw (the screw is captive) and lift the
cover from the engine.
4. Remove the two 5 mm muffler screws.
Remove the lower muffler screw, then
lift the muffler assembly from the en-
gine.
5. Remove the rear muffler shield bolt
and, while noting the orientation of
parts, separate the muffler shield.
6. Remove the spark arrester screen and
clean with a stiff bristle brush.
7. Gently tap the muffler on a wood sur-
face to dislodge any loose carbon.
8. Inspect the cylinder exhaust port for
carbon buildup.
IMPORTANT!
If you note excessive carbon buildup,
consult your servicing dealer.
9. Reassemble the muffler in the reverse
order of disassembly.
Rear Muffler
Shield
Rear Muffler
Shield Bolt
Figure 23
14
Cutter Blade Adjustment
The cutter blades are very sharp!
Always wear gloves when working
around the cutter assembly.
CAUTION!
Operating the trimmer with worn or
improperly adjusted cutters will reduce
cutter performance and may also dam-
age your machine.
Cutting performance of your machine de-
pends a great deal on proper cutter blade
adjustment. Properly adjusted blades will
oscillate freely yet help prevent binding of
cut material between blades. Adjust blades
as follows (Figure 4):
1. Loosen all blade locknuts at least one
full turn.
. Tighten each blade shoulder bolt firmly,
and then loosen the shoulder bolts 1/4
to 1/ turn.
3. Working from the gearcase end, lock
each bolt in place by firmly tightening
its locknut while preventing the shoul-
der bolt from turning.
When shoulder bolt adjustment is correct,
there should be a gap of
0.5–0.50 mm between the cutter blades
and the flat washers, and the flat washer
beneath each bolt head should turn freely.
Guide Bar
Cutter Blades
Figure 24
Spark Arrester
Screen
23139
Catalyst
Muffler
WARNING!
Locknut
AH231_38
Washer (should
turn freely)
Shoulder
Bolt
Forward
Muffler
Shield
5 mm Muffler
Screws
Lower Muffler
Screw
Long Term Storage
Whenever the machine will not be used
for 30 days or longer, use the following pro-
cedures to prepare it for storage:
n Clean external parts thoroughly and
apply a light coating of oil to all metal
surfaces.
CAUTION!
Gasoline stored in the carburetor for
extended periods can cause hard start-
ing, and could also lead to increased
service and maintenance costs.
NOTE
Damage resulting from stale or contaminated
fuel is not covered by the Shindaiwa warranty
policy.
n Drain all the fuel from the carburetor
and the fuel tank.
IMPORTANT!
All stored fuels should be stabilized with a
fuel stabilizer such as STA-BILT
n Remove the spark plug and pour about
1/4 ounce of oil into the cylinder
through the spark plug hole. Slowly pull
the recoil starter or 3 times so oil will
evenly coat the interior of the engine.
Reinstall the spark plug.
n Before storing the machine, repair or
replace any worn or damaged parts.
n Remove the air cleaner element from
the carburetor and clean it thoroughly
with soap and water. Rinse and dry
thoroughly, then add a few drops of oil
and work it in. Reassemble.
n Store the machine in a clean, dust-free
area.
®
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