17
Note: Moving the Z-fitting to a hole closer to the spring
decreases the gap between the control bar and the
handle; moving it to a hole farther from the spring
increases the gap.
4. Slide the spring cover over the cable adjuster and the
spring.
5. Hook the spring into the bottom hole of the control bar.
6. Check the adjustment (refer to steps 2 and 3 of
Checking the Cable on page 16).
For Models 38537 and 38538:
1. Unhook the upper cable end from the hole in the control
bar (Fig. 16).
2. Slide the spring cover up the cable to expose the cable
adjuster (Fig. 18).
1
2
3
Figure 18
1. Cable adjuster
2. Z-fitting
3. Spring cover
3. Unhook the Z-fitting from the cable adjuster (Fig. 17)
and position it in a higher or lower hole on the adjuster
to obtain a gap of 1/16 to 1/8 in. (2 to 3 mm) between
the control bar and the handle (Fig. 8).
Note: Moving the Z-fitting to a hole closer to the spring
decreases the gap between the control bar and the
handle; moving it to a hole farther from the spring
increases the gap.
4. Slide the spring cover over the cable adjuster.
5. Install the upper cable end into the bottom hole in the
control bar.
6. Check the adjustment (refer to steps 2 and 3 of
Checking the Cable on page 16).
After extended use, the drive belt may wear and lose its
proper belt tension. Improper belt tension causes the belt to
slip and decreases the performance under a heavy load. Belt
slippage may occur after 2 or 3 seasons of normal usage (10
to 15 hours). If the drive belt slips (continuously squeals)
under a heavy load, increase the belt tension by inserting
the spring end into the top hole of the control bar (Fig. 15
or Fig. 16).
Note: Using the incorrect adjusting hole can reduce the
drive belt life. 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 Rotor Blades
Before each season, inspect the rotor blades for wear. When
a rotor blade edge has worn down to the wear indicator
hole (Fig. 19), replace both rotor blades to ensure proper
performance and to prevent damage to the underside of the
snowthrower.
m-5538a
1
Figure 19
1. Rotor blade wear
indicator hole
Important Replace the scraper whenever you replace
the rotor blades. This ensures proper snowthrower
operation and performance.
Note: The running time and the roughness of the driveway
or the sidewalk determines the wear rate of the rotor blades.
Note: You need a No. 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. 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.
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