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9. Install the back cover and return the machine to the
operating position.
Replacing the Spark Plug
Service Interval: Yearly—Replace the spark plug.
Use a Champion QC12YC or equivalent spark plug.
Note: To access the spark plug, you must first remove the
upper snow hood (Figure 46).
1. Choke knob
2. Upper snow hood
1. Remove the choke knob and the ignition key (Figure
46).
2. Remove the 2 screws that secure the upper snow hood
to the machine (Figure 46).
3. Slowly remove the upper snow hood, ensuring that
the primer bulb hose and the ignition wire remain
connected.
4. Remove the bracket thumb screw and the bracket
(Figure 47).
Figure 46
3. Ignition key
4. Screw (2)
1. Spark-plug wire
2. Bracket
5. Clean around the base of the spark plug (Figure 47).
6. Remove and discard the old spark plug.
Note: You will need a ratchet wrench extension to
remove the spark plug.
7. Set the gap between the electrodes on a new spark plug
at 0.030 inch (0.76 mm) (Figure 48).
1. 0.030 inch (0.76 mm)
8. Install the new spark plug, tighten it firmly, and attach
the ignition wire to the spark plug.
9. Install the bracket with the thumb screw that you
removed in step 4.
10. Ensure that the primer bulb hose and the ignition wire
are connected and clear of the carburetor bracket.
11. Secure the upper snow hood to the machine with the 2
screws that you previously removed.
12. Align the tab on the choke control knob with the slot
on the upper snow hood.
13. Connect the choke control knob to the choke shaft on
the carburetor.
23
Figure 47
3. Thumb screw
Figure 48
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