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Replacing Spark Plug
(Fig. 14-16)
Check spark plug yearly or every 100 operating
hours. If electrodes in center of plug are dark or have
deteriorated, install a new plug. Use a Champion
RCJ8Y spark plug and set gap at .030" (.76 mm).
1.
REMOVE CONTROL PANEL
(Fig. 14)—Remove (2) screws securing control
panel to housing. Remove ignition key and lift
off panel, allowing it to hang on recoil rope.
2.
REMOVE SPARK PLUG (Fig. 15)—Pull wire
off spark plug and remove plug. Examine the
plug and replace if cracked, fouled, or dirty. DO
NOT SANDBLAST, SCRAPE, OR CLEAN
SPARK PLUG BECAUSE DIRT MAY
RELEASE AND FALL INTO CYLINDER
CAUSING ENGINE DAMAGE.
3.
INSTALL SPARK PLUG—Set air gap (Fig. 16)
between electrodes at .030" (.76 mm). Install
plug and tighten to 15 ft–lb (20.4 N m). If torque
wrench is not used, tighten plug firmly with
wrench by hand; DO NOT OVERTIGHTEN.
Push wire onto spark plug and reinstall control
panel.
Replacing Rotor Blades
(Fig. 17-19)
Before each snow season, inspect rotor blades for
wear. When blade edge has worn to the wear indicator
hole (Fig. 17), the blades must be replaced to ensure
proper performance and prevent damage to underside
of snowthrower. Always replace both blades at the
same time.
Note:
Whenever rotor blades are replaced,
scraper should also be replaced to
ensure proper snowthrower operation
and performance.
Note:
Rotor blades wear rates are determined
by the running time and the roughness
of the driveway or sidewalk.
EN–10
Removing Old Blade
1.
Remove (4) torx screws and (4) locknuts
securing outer edges of rotor blade to rotor shaft
assembly (Fig. 18).
2.
Next, remove (2) hex–head capscrews, spacers
and locknuts securing center of blade to steel
plates (Fig. 18).
3.
Loosen the hex–head screw securing the rotor
halves to the auger shaft assembly (Fig. 18).
4.
Slide the blade out from between the rotor halves
(Fig. 18).
Installing New Blade
1.
The rotor blades are made of laminated rubber.
Examine the edge of a blade to see the difference
in layer thicknesses (Fig. 19). (Some blades have
a part number on the thick side of the blade.)
Both blades must be installed with the thick
layer on the inside of the curve. If one blade is
installed with the thick layer on the outside of
the curve and the other blade installed with the
thick layer on the inside of the curve, the blades
will be unbalanced, causing the snowthrower to
"hop" or "bounce."
2.
Insert the new blade between the rotor halves.
Secure it to the rotor halves with (2) hex–head
capscrews, (2) spacers and (2) locknuts (Fig. 18).
Position bolt heads on thick (bottom) side of
blade. Curve the blade, and secure it with the
remaining (4) torx screws and locknuts (position
screw heads on thick side of blade). Tighten all
screws and nuts securely.
Adjusting Control Bar (Fig. 5-6)
Periodically check control bar for proper adjustment.
1.
Turn ignition key to OFF.
2.
CHECK ADJUSTMENT—Move control bar
back toward handle until slack in cable is
removed. Gap between control bar bracket and
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