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to the end of the threaded portion. If the
reach is too long, overheating and engine
damage may result. If the reach is too short,
spark plug fouling and poor performance
may result. Also, if the reach is too short, car-
bon will form on the exposed threads result-
ing in combustion chamber hot spots and
thread damage. Always use a spark plug with
the specified reach.
Spark plug reach:
19.0 mm (0.75 in)
1. Spark plug gap
2. Spark plug reach
Before installing any spark plug, measure the
spark plug gap with a wire thickness gauge
and adjust to specification.
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
When installing the spark plug, always clean
the gasket surface. Wipe off any grime from
the threads and tighten the spark plug to the
specified torque.
Spark plug tightening torque:
13 N·m (1.3 kgf·m, 9.4 lb·ft)
Periodic maintenance and adjustment
ECS00383
NOTICE
Make sure that the spark plug caps are se-
curely installed. Otherwise the spark plug
caps could be damaged due to engine vi-
bration.
ESU15030
Adjusting the throttle lever free
play
1.
Place the snowmobile on a level surface
and apply the parking brake.
2.
Open the shroud.
3.
Loosen the locknut.
4.
Turn the adjusting bolt in or out until the
specified throttle lever free play is ob-
tained.
1
1. Locknut
2. Throttle lever free play adjusting bolt
3. Throttle lever free play
Throttle lever free play:
2.0–3.0 mm (0.08–0.12 in)
5.
Tighten the locknut.
6.
Close the shroud.
ESU11864
Checking the throttle override
system (T.O.R.S.)
EWS00353
WARNING
When checking the T.O.R.S., take precau-
tions to avoid snowmobile movement
which could cause an accident:
2
3
47
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