User manual YAMAHA C-35

[. . . ] If you have any questions concerning the operation or maintenance of your snowmobile, please consult a Yamaha dealer. To maintain the high quality and performance of this snowmobile, it is important that you and your Yamaha dealer pay close attention to the recommended maintenance schedules and operating instructions contained within this manual. RX10GTX RX10GTAX RX10LTGTX RX10LTGTAX OWNER'S MANUAL ©2007 by Yamaha Motor Corporation, U. S. A. 1st Edition, March 2007 All rights reserved. [. . . ] Always use a spark plug with the specified reach. Spark plug reach: 19. 0 mm (0. 75 in) ECS00370 CAUTION: Make sure that all cables, leads, etc. , are routed properly before installing the shroud and covers. NOTE: When installing the shroud and covers, be sure to tighten the fasteners and the top cover bolts securely. ESU11780 Checking the spark plugs The spark plug is an important engine component and is easy to inspect. The condition of the spark plug can indicate the condition of the engine. Check the coloration on the white porcelain insulator around the center electrode. The ideal coloration at this point is a medium to a light tan color for a snowmobile that is being ridden normally. If a spark plug shows a distinctly different color, there could be something wrong with the engine. For example, a very white center electrode porcelain color could indicate an intake track air leak or carburetion problem for that cylinder. Do not attempt to diagnose such problems yourself. Instead, take the snowmobile to a Yamaha dealer for inspection and possible repairs. You should periodically remove and inspect the spark plug because heat and deposits will cause a spark plug to slowly break down and erode. Consult a Yamaha dealer before changing to a different type of spark plug. 1. Headlight unit bolt tightening torque: 3 Nm (0. 3 m·kgf, 2. 2 ft·lb) 9. Install the shroud. 46 Periodic maintenance ESU11861 Checking the throttle override system (T. O. R. S. ) Check the T. O. R. S. for proper operation. EWS00351 WARNING When checking the T. O. R. S. : G Make sure that the parking brake is applied. G Make sure that the throttle lever moves smoothly. G Do not rev the engine to the point that the clutch engages, otherwise the snowmobile could start moving, which could cause an accident. 1. Throttle lever 1. Start the engine. NOTE: Refer to the "Starting the engine" section on page 31. Hold the pivot point of the throttle lever away from the throttle switch by putting your thumb (above) and forefinger (below) between the throttle lever pivot and the engine stop switch housing. While holding the pivot point as described above, press the throttle lever gradually. The T. O. R. S. will be activated and the engine speed will be limited to less than the clutch engagement speed. (See page 77 for the clutch engagement speed. ) EWS00361 WARNING If the engine speed does not decrease to less than the clutch engagement speed, stop the engine by turning the main switch to the off position and consult a Yamaha dealer. ESU11881 Checking the air filter Always check that there is no snow under the air filter element frame. (See page 42 for removal procedures. ) 2. [. . . ] 32 S Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Self-diagnosis device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Shift lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Shroud and covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]