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14
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).
1
0. 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
)
scr
ews 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.
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.
NOTE: If using a torque wrench torque to:
110-120 in.•lb. (12.3-13.5 N•m). Do not over tighten.
0.025 in.
(0.635 mm)
Fig. 31
CLEANING
Use a small brush to clean 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.
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.
• Lock up the unit to prevent una
uthorized use or damage.
• Stor
e the unit in a dry, well-ventilated area.
• Store the unit out of the reach of children.
Long-term Storage
1. Remove the fuel cap, tip the unit and drain the fuel into an
approved container. Reinstall the fuel cap.
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 any high quality motor oil into the cylinder. Pull the starter rope
slowly to distribute the oil. Reinstall the spark plug.
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.
Preparing the Unit for Use after Long-term Storage
1. Remove the spark plug and drain all of the oil from the cylinder.
2.
Change the oil. Refer to Changing the Oil.
NOTE: Do not use fuel that has been stored for more than 30 days.
Dispose of old fuel and oil according to federal, state and local
regulations.
CAUTION:
Do not sand blast, scrape or clean
electrodes. Grit in the engine could damage the cylinder.
WARNING:
To avoid serious personal injury, always
stop the engine and allow it to cool before cleaning or
maintaining the unit.
CLEANING AND STORAGE
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