Adjusting The Engine Idling Speed; Adjusting The Throttle Cable Free Play - Yamaha VK10A Owner's Manual

1. Spark plug gap
2. Spark plug reach
Before installing any spark plug, measure the
electrode 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 Nm (1.3 m·kgf, 9.4 ft·lbf)
ECS00382
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.
ESU11794
Adjusting the engine idling
speed
1. Place the snowmobile on a level surface
and apply the parking brake.
2. Start the engine and warm it up.
TIP
Refer to the "Starting the engine" section on
page 29.
Periodic maintenance and adjustment
3. Open the shroud.
4. Turn the throttle stop screw in or out to
adjust the engine idling speed.
1. Throttle stop screw
Standard engine idling speed:
1300–1500 r/min
5. Close the shroud.
ESU11822
Adjusting the throttle cable free
play
ECS00410
NOTICE
Be sure to adjust the engine idling speed
first.
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 cable free play is ob-
tained.
43