2011 Yamaha Motorsports RS Viking Professional Owners Manual - Page 49

2011 Yamaha Motorsports RS Viking Professional Manual

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Periodic maintenance and adjustment 3. 4. Open the shroud. Turn the throttle stop screw in or out to adjust the engine idling speed. 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 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. 2. 3. 4. Place the snowmobile on a level surface and apply the parking brake. Open the shroud. Loosen the locknut. Turn the adjusting bolt in or out until the specified throttle cable free play is obtained. NOTICE Make sure that the spark plug caps are securely installed. Otherwise the spark plug caps could be damaged due to engine vibration. ESU11794 Adjusting the engine idling speed 1. 2. Place the snowmobile on a level surface and apply the parking brake. Start the engine and warm it up. TIP Refer to the "Starting the engine" section on page 29. 43

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Periodic maintenance and adjustment
43
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.
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.
3.
Open the shroud.
4.
Turn the throttle stop screw in or out to
adjust the engine idling speed.
5.
Close the shroud.
ESU11822
Adjusting the throttle cable free
play
NOTICE
ECS00410
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.
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:
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
1.
Throttle stop screw
Standard engine idling speed:
1300–1500 r/min