Craftsman 316.794830 - Manual (Page 13)

MAINTENANCE AND REPAIR INSTRUCTIONS
The recommended clearance for both intake and exhaust is .003 - .006
in. (.076 - 0.152 mm). Use a standard automotive .005 in. (0.127 mm)
feeler gauge. The feeler gauge should slide between the rocker arm
and valve stem with a slight amount of resistance, without binding. See
Figures 30 and 31.
8.
If the clearance is not within specification:
a. Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut
driver (Fig. 31).
• To increase clearance, turn the adjusting nut counterclockwise.
• To decrease clearance, turn the adjusting nut clockwise.
b. Recheck both clearances, and adjust as necessary.
9. Reinstall the rocker arm cover using a new gasket (Fig. 29).
Torque the screw to: 20-30 in»lb (2.2-3.4 N»m).
10. Check the spark plug and reinstall. See Replacing the Spark Plug.
11. Reinstall the spark plug wire.
12. Reinstall the engine cover. Check alignment of the cover before
tightening the screws. Tighten screws.
NOTE: Make sure that the screws are reinstalled into their original
holes (Fig. 28).
REPLACING THE SPARK PLUG
CAUTION: Do not sand blast, scrape, or clean
electrodes. Grit in the engine could damage the
cylinder.
Use a replacement part number 753-05784 or Champion spark plug
#RDZ4H. The correct spark gap is 0.025 in. (0.635 mm). Remove the
plug after every 40 hours of operation and check its condition.
1.
Stop the engine and allow it to cool.
2. Insert a flat blade screwdriver under the spark plug cover and
pry open (Fig. 32).
fT
3. Grasp the plug wire firmly and pull the cap from the spark plug.
4. Clean dirt from around the spark plug. Remove the spark plug
from the cylinder head by turning a
i
5/8 in. socket counterclockwise.
5. Replace cracked, fouled or dirty
spark plug. Set the spark gap at
0.025 in. (0.635 mm) using a feeler
gauge (Fig. 33).
6. Install a correctly-gapped spark
plug in the cylinder head. Turn the
5/8 in. socket clockwise until snug.
7. Reinstall the spark plug cover.
If using a torque wrench, torque to:
110-120 in.Hb. (12.3-13.5 N»m)
Do not over tighten.
SPARK ARRESTOR MAINTENANCE
0.025 in.
(0.635 mm)
=1
Fig. 33
WARNING: To avoid serious personal injury, always
turn your unit off and allow it to cool before you clean or
do any maintenance on it.
------------------------------------------ Fig. 34---------------------------------------------
wrench, remove the screws attaching the spark arrestor cover
to the muffler (Fig. 34).
3. Pull the the spark arrestor cover out of the muffler. Remove the
spark arrestor cover.
4. Remove the spark arrestor screen from the spark arrestor cover.
5. Clean the spark arrestor screen with a wire brush or replace it.
6. Reinstall the spark arrestor screen, spark arrestor cover, and
screws.
7. Reinstall the muffler cover.
CLEANING
WARNING: To avoid serious personal injury, always
turn your unit off and allow it to cool before you clean or
do any maintenance on it.
Use a small brush to clean off the outside of the unit. Do not use
strong detergents. Flousehold 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
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 blower 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.
1. Remove the muffler cover. See Rocker Arm Clearance.
2. With a 3/8-inch hex wrench or T-25 bit and a 1/4-inch hex
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