Maintenance And Repair Instructions - Craftsman WEEDWACKER 316.791860 Operator's Manual

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: Some maintenance procedures may require special tools or
skills. If you are unsure about these procedures take your unit to
Sears or other qualified service dealer. Call 1-800-4-MY-HOME
for more information.
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
Every 25 hours Check and clean spark arrestor
Check spark plug condition and gap
Every 50 hours Inspect exhaust port and spark
arrestor screen for clogging or
obstruction
LINE REPLACEMENT
Always use Craftsman Hassle-
Free™ XTRA QUIET Spiral
Line. Choose the line size
best suited for the job at
hand. Red colored line is
designed for cutting grass and
small weeds. Black colored
line is designed for cutting
larger weeds and light brush.
NOTE: Before inserting new
line into the holes in
the cutting head,
identify the proper
holes. Follow
directions as shown
on the line glide plate.
Do Not attempt to
remove the cutting
head from the unit
when replacing line.
1. Remove the old line and
line glide plate from the
cutting head.
2. Clean entire surface of
cutting head. Note
positions "A" and "B" on
the cutting head.
3. Reinstall line glide plate
(Fig. 10). Align arrow with:
"A" when using medium (red) or large (black) line, or
"B" when using lines with diameters smaller than medium (red) line
MAINTENANCE & REPAIR INSTRUCTIONS
Cutting Head
Glide Plate
Fig. 10
Positioning
Tunnel
Fig. 11
Fig. 12
NOTE: Line glide plate must be reinstalled in cutting head before
inserting new line.
4. Insert both ends of your line through the proper holes in the
side of the cutting head (Fig. 11).
5. Pull the line and make sure the line is against the hub and is
fully extended through the positioning tunnels (Fig. 12).
6. Correctly installed line will be the same length on both sides.
NOTE: Do not rest the Hassle-Free™ Cutting Head on the ground
while the unit is running.
Some line breakage will occur from:
®
• Entanglement with foreign matter
• Normal line fatigue
• Attempting to cut thick, stalky weeds
• Forcing the line into objects such as walls or fence posts
®
AIR FILTER MAINTENANCE
WARNING:
your unit off and allow it to cool before you clean or service it.
The condition of the air filter is important to the operation of the unit. A dirty air
filter will restrict air flow and
change the air/fuel mixture. This is
often mistaken for an out of
adjustment carburetor. Check the
condition of the air filter before
adjusting the idle speed screw.
SEE
Refer to Air Filter Maintenance.
p. 6
Removing the Air
Filter/Muffler Cover
1. Remove the four (4) screws
p. 8
securing the air filter/
p. 9
muffler cover (Fig. 13). Use
p. 9
a flat blade or T20 Torx bit
screwdriver.
p. 9
2. Pull the cover from the
engine. Do not force.
Cleaning the Air Filter
Arrow
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. 14).
3. Wash the filter in detergent
and water (Fig. 15). 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. 16).
5. Squeeze the filter to
spread and remove
excess oil (Fig. 17).
6. Replace the air filter
inside the air filter/muffler
cover (Fig. 14).
NOTE: Operating the unit
without the air filter
and air filter/muffler
cover assembly will
VOID the warranty.
7 7
To avoid serious personal injury, always turn
Screws
Fig. 13
Air Filter
Inside Muffler C over
Fig. 14
Fig. 15
Fig. 16
Fig. 17
Screws