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SPARK ARRESTOR MAINTENANCE
NOTE: Pay close attention when disassembling the muffler so you
can put it back together correctly. Failure to do so will
damage the unit and may cause serious personal injury.
1.
Remove air filter/muffler cover. Refer to Removing the Air
Filter/Muffler Cover.
2.
Locate the muffler, but do not remove it. Find the screw on the
bottom of the muffler (Fig. 18). This screw holds the Spark
Arrestor Hood Assembly and the spark arrestor screen to the
bottom of the muffler.
Remove this screw using
either a Torx T-20 or flat
blade screwdriver.
3.
Using a small flat blade
screwdriver, carefully pry
up the spark arrestor
screen from the recessed
hole, taking care to notice
that the "raised" part of the
spark arrestor screen is
inside the recessed hole. Remove the spark arrestor screen from
the muffler.
4.
Clean the spark arrestor screen with a wire brush. Replace it if it
is damaged, or if you are unable to clean it thoroughly.
5.
Reinstall the spark arrestor screen by putting the "raised"
portion of the screen inside the recessed hole of the muffler.
Make sure that the spark arrestor screen fits flat against the
muffler.
6.
Place the spark arrestor hood on top of the spark arrestor plate
with the "raised" side up and the opening facing AWAY from the
engine (Fig. 18). Verify that the exhaust will be directed AWAY
from the engine.
7.
Replace the screw you removed in Step 2 and tighten securely.
8.
Reinstall the air filter/muffler cover (Fig. 13).
WARNING:
If the spark arrestor hood and spark arrestor
screen are not tightened securely, they could fall off causing
damage to the unit and possible serious personal injury.
CARBURETOR ADJUSTMENT
NOTE: Careless adjustments can seriously damage your unit. Contact
a Sears or other qualified service dealer to make carburetor
adjustments. Call 1-800-4-MY-HOME
REPLACING THE SPARK PLUG
Use a Champion RDJ7Y spark plug or equivalent. Remove the plug
after every 25 hours of operation and check its condition.
1.
Stop the engine and allow it to cool. Grasp the plug boot firmly
and pull it from the spark plug.
2.
Clean around the spark plug. Remove the spark plug from the
cylinder head by turning a 5/8-inch socket counterclockwise.
WARNING:
Do not sand blast, scrape or clean spark plug
electrodes. Grit in the engine could damage the cylinder.
3.
Replace a cracked, fouled
or dirty spark plug. Set
the air gap at 0.025 in.
(0.635 mm) using a feeler
gauge (Fig. 19).
4.
Install a correctly-gapped
spark plug in the cylinder
head. Tighten by turning the
5/8-inch socket clockwise
until snug. If using a torque
wrench, torque to:
110-120 in.•lb. (12.3-13.5 N•m). Do not over-tighten.
MAINTENANCE & REPAIR INSTRUCTIONS
Spark Arrestor Hood
Slots
Screws
Spark Arrestor
Tabs
Screen
Fig. 18
®
for more information.
0.025 in.
(0.635 mm)
Fig. 19
TRANSPORTING
• Allow the engine to cool before transporting.
• Drain fuel from unit.
• Tighten fuel cap before transporting.
• Secure the unit while transporting.
CLEANING
WARNING:
trimmer off and allow it to cool before you clean or maintain it.
Engine
Use a small brush to clean off the outside of the unit. Do not use strong
detergents. Household cleaners that contain aromatic oils such as pine
and lemon, and solvents such as kerosene, can damage plastic housing
or handle. Wipe off any moisture with a soft cloth.
STORAGE
• Never store a fueled unit where fumes may reach an open flame or spark.
• Allow the engine to cool before storing.
• Store the unit locked up to prevent unauthorized use or damage.
Muffler
• Store the unit in a dry, well-ventilated area.
• Store the unit out of the reach of children.
LONG TERM STORAGE
If you plan on storing the unit for an extended time, use the
following storage procedure:
1.
Carefully drain the fuel tank by running the unit dry or remove
fuel cap and tip the motor housing over and drain oil/gas fuel
into a container with the same 2-cycle fuel mixture. Do not use
fuel that has been stored for more than 60 days.
2.
Start the engine and allow it to run until it stalls. This ensures
that all fuel has been drained from the carburetor.
3.
Allow the engine to cool. Remove the spark plug and put 1 oz.
(30 ml) of any high quality motor oil or 2-cycle oil into the
cylinder. Pull the starter rope slowly to distribute the oil.
Reinstall the spark plug.
NOTE: Remove the spark plug and drain all of the oil from the
cylinder before attempting to start the trimmer after storage.
4.
Thoroughly clean the unit and inspect it for any loose or
damaged parts. Repair or replace damaged parts and tighten
loose screws, nuts or bolts. The unit is ready for storage.
8
To avoid serious personal injury, always turn your
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