Replacing The Spark Plug

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 14.

9.Insert the four (4) screws into the holes in the air filter/muffler cover and tighten. See Figure 14. Use a flat blade or # T20 Torx bit screwdriver. Do not over tighten. Do not force.

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 17.

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 17

Line Installation

This section covers both SplitLine™ and standard single line installation.

Always use manufacturer’s 0.080 inch (2.03 mm) replacement line. Line other than specified may make the engine overheat or fail.

WARNING: Never use metal-reinforced line, wire, chain, or rope, etc. These can break off and become a dangerous pro- jectile.

There are two methods to replace the trimming line.

•Wind the inner reel with new line

•Install a prewound inner reel

Winding the Existing Inner Reel

1.Hold the outer spool with one hand and unscrew the Bump Knob counterclockwise. Inspect the bolt inside the Bump Knob to make sure it moves freely. Replace the Bump Knob if damaged. See Figure 18.

2.Remove the inner reel from the outer spool. See Figure 19.

3.Remove spring from the inner reel. See Figure 19.

4.Use a clean cloth to clean the the inner reel, spring, shaft, and inner surface of the outer spool.

5.Check the indexing teeth on the inner reel and outer spool for wear. If necessary, remove burrs or replace the reel and spool. See Figure 20.

NOTE: SplitLine™ can only be used with the inner reel with the slotted holes. Single line can be used on either type of inner reel. Use figure 21 to identify the inner reel you have.

NOTE: Always use the correct line length when installing trimming line on the unit. The line may not release properly if the line is too long.

Bolt

Bump Knob

Figure 18