MAINTENANCE AND REPAIR INSTRUCTIONS

13.If the clearance is not within specification:

a.Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut driver (Fig. 37).

•To increase clearance, turn the adjusting nut counterclockwise.

•To decrease clearance, turn the adjusting nut clockwise.

b.Recheck both clearances, and adjust as necessary.

14.Reinstall the rocker arm cover using a new gasket. Torque the screw to 20–30 in•lb (2.2–3.4 N•m).

15.Check the spark plug and reinstall. See Replacing the Spark Plug.

16.Reinstall the spark plug wire.

17.Reinstall the engine cover. Check alignment of the cover before tightening the screws. Tighten screws.

18.Push rear end of handle into rear screw location.

19.Slide screw through plastic housing and handle. (Do not tighten screw.)

20.Open vacuum door, prop open with hand.

21.Push front end of handle into front screw location.

22.Slide front handle screw through plastic housing. (Do not tighten screw.)

23.Tighten screw near switch and near vacuum door hinge.

24.Tighten handle screws while holding nuts with 3/8” nut driver.

REPLACING THE SPARK PLUG

Use a replacement part number 753-05255 or Champion spark plug, #RDZ19H. The correct spark gap is 0.025 in. (0.635 mm.). 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. socket counterclockwise.

CAUTION: Do not sand blast, scrape or clean electrodes. Grit in the engine could damage the cylinder.

Muffler

Spark Arrestor Screen

Diverter

T-25 Screw

Slot

T-20 Screw

 

Fig. 39

5.Clean the spark arrestor screen with a wire brush or replace it.

6.Reinstall the spark arrestor screen, spark arrestor diverter 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.

4.Replace cracked, fouled or

dirty spark plug. Set the spark gap at 0.025 in. (0.635 mm.) using a feeler gauge (Fig. 38).

0.025 in.

5. Install a correctly-gapped (0.635 mm.) 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)

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

Do not over tighten.

Fig. 38

damaged parts. Repair or replace damaged parts and

tighten loose screws, nuts or bolts. The unit is ready for

SPARK ARRESTOR MAINTENANCE

WARNING: To avoid serious personal injury, always turn your unit off and allow it to cool before you clean or service it.

1.Remove the rear engine cover. See Rocker Arm 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. 39).

3.Pull the the spark arrestor diverter out of the muffler. Remove the spark arrestor diverter.

4.Remove the spark arrestor screen from the spark arrestor diverter.

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.

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