Operator's Manual

14
Note: After extensive use, the drive belt may wear and lose
its proper belt tension. Improper belt tension causes belt
slippage and decreases the performance under a heavy load.
Belt slippage may occur after two or three seasons of
normal usage (10 to 15 hours). If the drive belt slips
(continuously squeals) under a heavy load, increase the belt
tension by moving the Z-fitting to the next hole to the right
on the cable adjuster (Fig. 5).
Note: Occasional belt slippage (squealing) may occur in
extremely wet conditions due to moisture in the drive
system. To remove moisture, start the rotor and operate it
without a load for 30 seconds. Once you remove the
moisture, the drive belt should not slip.
Replacing the Scraper
Before each season, inspect the scraper for wear. If the
thickness from the top of the wear indicator groove to the
bottom of the scraper is less than 1/16 inch (1.6 mm) or
there is no longer a wear indicator groove, replace the
scraper (Fig. 9).
1
2
923
3
Figure 9
1. Scraper
2. Wear indicator groove
3. Screw (3)
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.
4. Remove the three screws that hold the old scraper in
place (Fig. 9).
5. Remove the old scraper.
6. Secure the new scraper to the housing with the three
screws.
7. Connect the wire to the spark plug.
8. Install the control panel.
9. Insert the key in the switch.
Replacing the Rotor Blades
Before each season, inspect the rotor blades for wear. When
a rotor blade edge has worn to the wear indicator hole
(Fig. 10), replace both rotor blades to ensure proper
performance and to prevent damage to the underside of the
snowthrower. The running time and the roughness of the
driveway or the sidewalk determines the wear rate of the
rotor blades.
1
Figure 10
1. Wear indicator hole
Important Replace the scraper whenever you replace
the rotor blades. This ensures proper snowthrower
operation and performance. Refer to Replacing the Scraper
on page 14.
Note: You need a T27 torx driver to complete this
procedure.
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.
4. Remove four torx screws, two bolts, and six locknuts
that secure the one of the rotor blades to the rotor shaft
assembly (Fig. 11).