Craftsman WEEDWACKER 316.791191 Operator's Manual page 8

counterclockwise (Fig. 14).
Inspect the bolt inside the Eyelets
bump knob to make sure it
moves freely. Replace the
bump knob if damaged.
2. Remove the old inner reel from
the outer spool (Fig. 15).
3. Remove the spring from the
old inner reel (Fig. 15).
4. Place the spring in the new
inner reel.
NOTE: The spring must be Fig. 21
assembled on the inner
reel before reassembling the cutting head.
5. Insert or slide the ends of the line through or into the eyelets in the outer
spool (Fig. 21).
6. Place the new inner reel inside the outer spool. Push the inner reel and
outer spool together. While holding the inner reel and outer spool, grasp the
ends and pull firmly to release the line from the holding slots in the spool.
7. Hold the inner reel in place and install the bump knob by turning
clockwise. Tighten securely.
AIR FILTER MAINTENANCE
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L_ ARNING:
To avoid serious personal injury, always turn the unit off
and allow it to cool before cleaning or maintaining it.
Failure to maintain the air filter properly can result in poor performance or
can cause permanent damage to the engine.
1. Open the air filter cover by
pressing the lock tab in and Air Filter
pulling out on the air filter Cover
cover (Fig. 22). Tab
2. Remove the air filter (Fig. 22).
3. Wash the filter in detergent
and water. Rinse the filter
thoroughly and allow it to dry. Air
4. Apply enough clean SAE 30 Filter
motor oil to lightly coat the
filter.
5. Squeeze the filter to spread Fig. 22
and remove excess oil.
6. Replace the air filter into the base plate (Fig. 22).
NOTE: Operating the unit without the air filter WILL VOID the warranty.
7. Reinstall the air filter cover. Position the two small tabs on the air filter
cover into the two slots in the base plate and press the air filter cover
down, making sure to align the lock tab with the lock tab slot, until it
snaps into place (Fig. 22).
IDLE SPEED ADJUSTMENT
The idle speed of the engine is adjustable. An idle adjustment screw is
between the air filter cover and the engine starter housing (Fig. 17).
NOTE: Careless adjustments can seriously damage the unit. An authorized
service dealer should make carburetor adjustments.
If, after checking the fuel mixture and cleaning the air filter, the engine still
will not idle, adjust the idle speed screw as follows:
1.
2.
Start the engine and run for
one minute to warm up.
Refer to Starting/Stopping
Instructions.
Release the throttle trigger and
let the engine idle. If the engine
stops, insert a small phillips
screwdriver into the idle
adjustment screw (Fig. 17).
Turn the idle speed screw
clockwise 1/8 of a turn at a
time (as needed) until the
engine idles smoothly.
Fig. 23
Idle Speed
Screw
3. If the engine appears to be idling too fast, turn the idle speed screw
counterclockwise 1/8 of a turn at a time (as needed), to reduce idle
speed.
Checking the fuel mixture, cleaning the air filter and adjusting the idle speed
should solve most engine problems. If not and all of the following are true:
• the engine will not idle
the engine hesitates or stalls on acceleration
there is a loss of engine power
Have the carburetor adjusted by an authorized service dealer.
REPLACING THE SPARK PLUG
Use a Champion RDJ7J or a replacement part #753-06193 spark plug (or
equivalent).
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.
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A I WARNING:
Do not sand blast, scrape or clean spark plug
e ectrodes. Grt n the eng ne cou d damage the cy rider. | J
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. 25).
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.olb. (12.3=13.5
N,rn). Do not over-tighten.
5. Reattach the plug boot.
0.025 in.
(0.635 ram) t
Fig. 24
CLEANING
Use a small brush to clean offthe 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.
Store the unit in a dry, well-ventilated area.
Store the unit out of the reach of children.
LONG TERM STORAGE
If planning on storing the unit for an extended time, use the following storage
procedure:
1. Removing the fuel cap, tip the unit and drain the fuel into an approved
container.
NOTE: Do not use gas that has been stored for more than 30 days.
Dispose of the old gasoline in accordance to Federal, State, and
Local regulations.
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 5 drops of
high quality motor 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.
PLUG=IN POWER START AND POWER BIT START FEATURES
This unit can be started with an optional ! 1
Plug-In Power Start or Power Bit Start (may
be sold separately). If choosing to start the
unit using one of these features or have
questions, please contact your local
Craftsman retailer or call 1-800=4-MY=
HOME@ for more information and purchasing.
You may also go to www.craftsman.com.
Power Start Feature
Item No. Description
316.85951 ..................................... Plug-In Power Start
316.85952 ........................................ Power Bit Start