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Periodic maintenance and adjustment
46
is too long, overheating and engine damage
may result. If the reach is too short, spark plug
fouling and poor performance may result. Al-
so, if the reach is too short, carbon will form on
the exposed threads resulting in combustion
chamber hot spots and thread damage. Al-
ways use a spark plug with the specified
reach.
Before installing any spark plug, measure the
electrode gap with a wire thickness gauge
and adjust to specification.
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.
NOTICE
ECS00382
Make sure that the spark plug caps are se-
curely installed. Otherwise the spark plug
caps could be damaged due to engine vi-
bration.
ESU12792
Adjusting the throttle cable free
play
1. Loosen the locknut.
2. To increase the throttle cable free play,
turn the adjusting bolt in direction (a). To
decrease the throttle cable free play, turn
the adjusting bolt in direction (b).
3. Tighten the locknut.
ESU11862
Checking the throttle override
system (T.O.R.S.)
Check the T.O.R.S. for proper operation.
WARNING
EWS00352
When checking the T.O.R.S., take precau-
tions to avoid snowmobile movement
which could cause an accident:
Spark plug reach:
19.0 mm (0.75 in)
1. Spark plug gap
2. Spark plug reach
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
Spark plug tightening torque:
12.5 Nm (1.25 m·kgf, 9 ft·lbf)
1. Locknut
2. Throttle cable free play adjusting bolt
3. Throttle cable free play
Throttle cable free play:
3.0–4.0 mm (0.12–0.16 in)
(b)
(a)
1
2
U8HK10E0.book Page 46 Tuesday, June 10, 2008 1:58 PM