Craftsman WEEDWACKER INCREDI.PULL 316.791970 Operator's Manual page 13

8. Iftheclearance isnotwithin specification: 4. Remove thespark arrestor screen f rom thespark arrestor
a.Turn theadjusting nutusing a 5/16 inch (8mm) w rench o rnut diverter.
driver ( Fig. 3 4). 5. Clean t hespark arrestor screen w ithawirebrush orreplace i t.
• Toincrease clearance, turn theadjusting nut 6. Reinstall thespark arrestor screen, spark arrestor diverter and
counterclockwise, screws.
Todecrease clearance, turn theadjusting nutclockwise.
b.Recheck bothclearances, andadjust asnecessary.
9. Reinstall therocker arm cover u sing a new gasket. Torque t he
screw to20-30 inolb (2.2-3.4 N ,m).
10.Check t hespark plug andreinstall. See Replacing theSpark
Plug.
11.Replace thespark plug wire.
12.Reinstall theengine c over. Check a lignment ofthecover b efore
tightening thescrews. Tighten screws.
REPLACING THE SPARK PLUG
[_1 ARNING:
Do not sand blast, scrape or clean
electrodes. Grit in the engine could damage the
cylinder.
Use a replacement part number 753-05255 or Champion spark
plug, #RDZ19H. The correct air gap is 0.025 in. (0.635 ram).
Remove the plug after every 25 hours of operation and check its
condition.
1. Stop the engine and allow it to cool. Remove the six (6) screws
on the back of the engine cover with a Flat-head or T-25 Torx
screwdriver (Fig. 31).
2. Grasp the plug wire firmly and
pull the cap from the spark plug.
3. Clean dirt from around the spark
plug. Remove the spark plug
from the cylinder head by turning
a 5/8 in. (16 mm) socket
counterclockwise.
0.025 in.
(0.635 mm)
Fig. 35
4. Replace cracked, fouled or dirty
spark plug. Set the air gap at
0,025 in. (0.635 ram) using a
feeler gauge (Fig. 35).
5. Install a correctly-gapped spark
plug in the cylinder head. Turn the 5/8 in. socket clockwise until
snug.
If using a torque wrench, torque to:
t10-120 in.olb. (12.3-t3.5 N,m)
Do not over tighten.
SPARK ARRESTOR MAINTENANCE
1. Remove the rear engine cover. See RockerArm Clearance,
2. With a flat blade screwdriver or Torx T-20 bit and a T-25 bit,
remove the screws attaching the spark arrestor diverter to the
muffler (Fig. 36).
CLEANING
!_IL I WARNING:
To avoid serious personal injury, always
turn your unit off and allow it to cool before you clean
or service it.
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 the unit with fuel in the tank where fumes may reach
an open flame or spark.
Allow the engine to cool before storing.
Lock up the unit 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 the unit must be stored for a long time:
1. Drain all gasoline from the gas tank into a container. Do not use
gas that has been stored for more than 60 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 gasoline 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. Change the oil, referring to Changing the Oil. Dispose of the old
oil in accordance to Federal, State and Local regulations.
5. Thoroughly clean the unit and inspect for any loose or
damaged parts. Repair or replace damaged parts and tighten
loose screws, nuts or bolts. The unit is ready for storage.
TRANSPORTING
Allow the engine to cool before transporting.
Secure the unit while transporting.
Drain the gas tank before transporting.
Tighten gas cap before transporting.
3,
Muffler
Spark Arrestor Screen
Diverter
/ T-25 Screw
so
Fig. 36
Pull the the spark arrestor diverter out of the muffler. Remove
the spark arrestor diverter.
t3