Craftsman 316.79187 - Manual (Page 11)

11
Adjust Idle Speed Screw
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.
Start the engine and let it run at a high idle for a minute to
warm up. Refer to Starting/Stopping Instructions (p. 7).
2. Release the throttle trigger and let the engine idle. If the
engine stops, insert a small phillips or flat blade
screwdriver into the hole in the air filter/muffler cover (Fig.
20). Turn the idle speed screw in, clockwise, 1/8 of a turn
at a time (as needed) until the engine idles smoothly.
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, have
the carburetor adjusted by a Sears or other qualified service
dealer. Call 1-800-4-MY-HOME
® for more information.
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.
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. 21).
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.
5. Reattach the plug boot.
TRANSPORTING
• Allow the engine to cool before transporting.
• Drain fuel from unit.
• Tighten fuel cap before transporting.
• Secure the unit while transporting.
0.025 in.
(0.635 mm)
Fig. 21
MAINTENANCE & REPAIR INSTRUCTIONS
WARNING: Do not sand blast, scrape or clean
spark plug electrodes. Grit in the engine could
damage the cylinder.
WARNING: The cutting attachment may spin
during idle speed adjustments. Wear protective
clothing and observe all safety instructions to
prevent serious personal injury.
CLEANING
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.
• 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.
WARNING: To avoid serious personal injury,
always turn your trimmer off and allow it to cool
before you clean or maintain it.