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MAINTENANCE AND REPAIR INSTRUCTIONS
8.
If the clearance is not within specification:
a. Turn the adjusting nut (Fig. 30) using a 5/16 inch (8 mm) wrench
or nut driver.
• 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. 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. Replace the spark plug wire.
12. Reinstall the engine cover. Check alignment of the cover before
tightening the screws. Tighten screws.
REPLACING THE SPARK PLUG
Use a replacement part number 753-05784 or Champion® RDZ4H
spark plug. The correct air gap is 0.025 in. (0.635 mm).
1.
Stop the engine and allow it to cool. Remove the seven (7)
screws on the back of the engine cover with a Flat-head or T-
25 Torx® screwdriver (Fig. 27).
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. socket
counterclockwise.
CAUTION:
Do not sand blast, scrape or clean
electrodes. Grit in the engine could damage the cylinder.
4.
Replace cracked, fouled or dirty spark plug. Set the air gap at
0.025 in. (0.635 mm) using a feeler gauge (Fig. 31).
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:
110-120 in.•lb. (12.3-13.5 N•m)
Do not over tighten.
14
0.025 in.
(0.635 mm)
Fig. 31
CLEANING AND STORAGE
CLEANING
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
1.
Drain all gasoline from the gas tank into a container. Do not use gas
that has been stored for more than 30 days. Dispose of the old
gasoline in accordance with 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 seven (7) screws on the
back of the engine cover with a Flat-head or T-25 Torx®
screwdriver. 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 unit after storage.
4.
Change the oil, referring to Changing the Oil. Dispose of the
old oil in accordance with 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.
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