Maintenance And Repair Instructions; Maintenance Schedule; Air Filter Maintenance; Spark Arrestor Maintenance - Craftsman WEEDWACKER 316.791890 Manual De Instrucciones

MAINTENANCE SCHEDULE

WARNING:
To prevent serious injury, never
perform maintenance or repairs with unit running.
Always service and repair a cool unit. Disconnect the
spark plug wire to ensure that the unit cannot start.
Perform these required maintenance procedures at the
frequency stated in the table. These procedures should also be
a part of any seasonal tune-up.
NOTE: Maintenance, replacement, or repair of the emission
control devices and system may be performed by a Sears
or other qualified service dealer. Call 1-800-4-MY-HOME
for more information.
In order to assure peak performance of your engine, inspection
of the engine exhaust port may be necessary after 50 hours of
operation. If you notice lost RPM, poor performance or general
lack of acceleration, this service may be required. If you feel
your engine is in need of this inspection, refer service to a
Sears or other qualified service dealer. Call 1-800-4-MY-
®
HOME for more information. DO NOT attempt to perform this
process yourself as engine damage may result from
contaminants involved in the cleaning process for the port.
FREQUENCY MAINTENANCE REQUIRED
Before starting
Fill fuel tank with fresh fuel
engine
Every 10 hours Clean and re-oil air filter
Check and clean spark arrestor
Every 25 hours
Check spark plug condition and gap
Inspect exhaust port and spark
Every 50 hours arrestor screen for clogging or
obstruction

AIR FILTER MAINTENANCE

WARNING:
To avoid serious personal injury,
always turn your unit off and allow it to cool before
you clean or service it.
Removing the Air Filter/Muffler Cover
1. Remove the four (4) screws
securing the air filter/muffler
cover (Fig. 14). Use a flat
blade or T20 Torx bit
screwdriver.
2. Pull the cover from the
engine. Do not force.
Cleaning the Air Filter
Failure to maintain your air
filter properly can result in poor
performance or can cause
permanent damage to your
engine.
1. Remove air filter/muffler
cover. Refer to Removing
the Air Filter/Muffler Cover
above.
2. Turn cover over and look inside to locate the air filter.
Remove the air filter from inside the air filter/muffler cover
(Fig. 15).
MAINTENANCE & REPAIR INSTRUCTIONS
®
SEE
p. 5
p. 8
p. 8
p. 9
p. 9
Screws
Fig. 14
8
3. Wash the filter in
detergent and water
(Fig. 16). Rinse the filter
thoroughly. Squeeze
out excess water. Allow
it to dry completely.
4. Apply enough clean SAE
30 oil to lightly coat the
filter (Fig. 17).
5. Squeeze the filter to
spread and remove
excess oil (Fig. 18).
6. Replace the air filter
inside the air filter/muffler
cover (Fig. 15).
Fig. 16
Reinstalling the Air Filter/Muffler
Cover
1. Place the air filter/muffler cover
over the back of the carburetor
and muffler. Align the screw holes.
2. Insert the four (4) screws into the
holes in the air filter/muffler cover
(Fig. 12) and tighten. Do not over
tighten.

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 (p. 8).
2. Locate the muffler, but do not remove it. Find the screw on
the bottom of the muffler (Fig. 19). 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
T20 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 plate on top of the spark arrestor screen
with the raised side up and the opening facing toward the engine
(Fig. 19)
7. Place the spark arrestor hood on top of the spark arrestor
Inside Muffler
Cover
Air Filter
Fig. 15
Fig. 17
Fig. 18