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Rocker Arms
Feeler Gauge
Spark Plug Hole
Adjusting Nut
.003–.006 in.
(.076–.152 mm)
Intake Valve
Stem
REPLACING THE SPARK PLUG
WARNING:
Do not sand blast, scrape or clean electrodes. Grit
in the engine could damage the cylinder.
Use a Champion RDZ4H or a replacement part number 753-05784 spark
plug. The correct air gap is 0.025 in. (0.635 mm.). Remove the plug and
check its condition per the Maintenance Schedule.
1.
Stop the engine and allow it to cool. Remove the eight (8) screws on the
back of the engine cover with a Flat-head or T-25 Torx screwdriver (Fig. 30).
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. 34).
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.
12
MAINTENANCE AND REPAIR INSTRUCTIONS
Adjusting Nuts
INTAKE
EXHAUST
Fig. 32
Rocker Arm
Feeler Gauge
Valve Stem
Fig. 33
0.025 in.
(0.635 mm)
Fig. 34
SPARK ARRESTOR MAINTENANCE
Inspect the spark arrestor per the Maintenance Schedule.
1.
Remove the rear engine cover. See Rocker Arm Clearance.
2.
With a flat blade screwdriver, or a Torx T-20 bit and a T-25 bit, remove
the 2 screws attaching the spark arrestor cover to the muffler (Fig. 35).
Muffler
Slot
Spark Arrestor Screen
Spark Arrestor Cover
3.
Pull the tab on 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.
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 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 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 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.
T-25 Screw
T-20 Screw
Fig. 35
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