Operator's Manual

16
5. Remove the 6 bolts and locknuts that hold the scraper in
place (Fig. 16).
m-5060/m-5547
3
2
1
Figure 16
1. Carriage bolt (6)
2. Locknut (6)
3. Scraper
6. Remove the old scraper.
7. Install a new scraper to the housing using the bolts and
the locknuts you previously removed.
8. Connect the wire to the spark plug.
9. Install the control panel.
10. Insert the key in the switch.
Replacing the Spark Plug
Use a NGK BPMR4A or equivalent spark plug. Install a
new spark plug before each season.
1. Stop the engine and wait for all moving parts to stop.
2. Remove the key from the switch.
3. Remove the 2 mounting screws that secure the control
panel to the housing (Fig. 17).
m-5061
1
2
Figure 17
1. Control panel 2. Mounting screws (2)
4. Lift off the panel, allowing it to hang on the recoil rope.
5. Lift up the shroud and disconnect the wire from the
spark plug (Fig. 18).
m-5062
2
1
Figure 18
1. Shroud 2. Spark-plug wire
6. Clean any debris from around the base of the spark
plug.
7. Remove the spark plug.
8. Examine the spark plug and replace it if it is cracked,
fouled, dirty, or if the electrodes are worn.
Important Do not clean the electrodes because grit
could enter the cylinder and damage the engine.
9. Set the gap between the electrodes on the new spark
plug at 0.030 in. (0.76 mm) as shown in Figure 19.
1
m-3215
Figure 19
1. 0.030 in. (0.76 mm)
10. Install the spark plug by hand and then torque it to
15 ft-lb (20.4 Nm). If you do not have a torque wrench,
tighten the plug firmly.
11. Connect the wire to the spark plug.
12. Install the control panel.
13. Insert the key in the switch.
Replacing the Drive Belt
Inspect the drive belt before each season, and replace it if it
is worn or damaged.
1. Stop the engine and wait for all moving parts to stop.
2. Remove the key from the switch.
3. Disconnect the wire from the spark plug. Refer to steps
3 through 5 of Replacing the Spark Plug on page 16.