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SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS
Replacing the Spark Plug
Use a replacement part number 180852 spark plug (or
equivalent). The correct air gap is 0.025 inch (0.655
mm). Remove the plug after every 25 hours of operation
and check its condition.
1. Stop the engine and allow it to cool. Grasp the plug
wire firmly and pull it from the spark plug.
2. Clean around the spark plug. Remove the spark plug
from the cylinder head by turning a 5/8 in. socket
counterclockwise.
3. Replace cracked, fouled or dirty spark plug. Set the
air gap at 0.025 in. (0.655 mm) using a feeler gauge.
See Figure 56.
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 cylinder
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.
0.025 in.
(0.655 mm)
Figure 56
Muffler
Spark Arrestor Screen
Spark Arrestor Cover
Tab
Slot
Spark Arrestor Maintenance
1. Remove the muffler cover. See Rocker Arm Clearance.
2. With a flat blade screwdriver or Torx T-20 bit,
remove the screw attaching the spark arrestor cover
to the muffler. See Figure 57.
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 screw.
Figure 57