19
Replacing the Scraper
Note: If the rotor blades are partially or completely worn,
replace the rotor blades when you replace the scraper. This
ensures proper snowthrower operation and performance.
1. Stop the engine and wait for all moving parts to stop.
2. Remove the key from the switch.
3. Remove the control panel and disconnect the wire from
the spark plug. Refer to steps 3 through 5 of Replacing
the Spark Plug on page 19.
4. Tip the snowthrower forward onto its front housing.
5. Remove the 3 carriage bolts and the locknuts that hold
the scraper in place (Fig. 22).
1
2
3
m-5535
Figure 22
1. Carriage bolt (3)
2. Locknut (3)
3. Scraper
6. Remove the old scraper by sliding it to the right and
down.
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 3 mounting screws that secure the control
panel to the housing (Fig. 23).
1
2
m-5061a
Figure 23
1. Control panel 2. Mounting screws (3)
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. 24).
1
2
m-5529
Figure 24
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 spark plug at
0.030 in. (0.76 mm) as shown in Figure 25.
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