7.Replace the air filter inside the air filter/muffler cover. See Figure 24.

NOTE: Operating the unit without the air filter and air filter/muffler cover assembly, will VOID the warranty.

8.Place the air filter/muffler cover over the back of the carburetor and muffler.

NOTE: The choke control must be in the PARTIAL choke position (B) to install the air filter/muffler cover. See Figure 23.

9.Insert the four (4) screws into the holes in the air filter/muffler cover and tighten. See Figure 23. Use a flat blade or # T20 Torx bit screwdriver. Do not over tighten. Do not force.

Replacing The Spark Plug

Use a Champion RDJ7Y spark plug (or equivalent). The correct air gap is 0.020 inch (0.5 mm). Remove the plug after every 50 hours of operation to check its condition.

1.Stop the engine and allow it to cool. Grasp the plug wire firmly and pull the cap from the spark plug.

2.Clean dirt from around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8 in. socket counterclockwise.

NOTE: Replace cracked, fouled or dirty spark plug.

3.Set the air gap at 0.020 inch (0.5 mm) using a feeler gauge. See Figure 26.

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

4.Install a correctly gapped spark plug in the cylin- der head. Tighten by turning the 5/8 inch 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.

0.020 inch

(0.5 mm)

Figure 26

Tine Removal And Replacement

All 4 tines should be replaced at the same time because they will wear evenly through normal use. Work on one side at a time.

WARNING: To prevent serious personal injury, always wear heavy gloves when handling the tines.

1.Put the On/Off Stop Control in the STOP (O) position and disconnect the spark plug wire.

2.Remove the clevis pin clips and clevis pins. See Figure 27.

3.Remove the tines and felt cushions from the shaft.

4.Clean and oil the shaft.

5.The tines are stamped with the letter "R" or "L" to identified their position on each side of the gear- box when facing the front of the unit.

6.Replace the tines and felt cushions onto the shaft with the hubs on the tines facing each other.

7.Ensure the tips on tines are aligned in the same direction with each other before reinstalling the clevis pins and pin clips. See Figure 28.

8.Repeat this procedure on the opposite side.

NOTE: When installed correctly, there will be an "R" and "L" tine on each side of the gearbox and the tips on the tines line up in the same direction. It is important that the tines are installed correctly.

Clevis Pin

Felt

Cushion

Tine Hubs

Clevis Pin Clip

Figure 27

Align Tips

Shaft

Felt

L R

Cushion

L

R

Figure 28

14