Yamaha RX10K Owner's Manual

Also see for RX10K: Supplementary service manual Assembly manual

Contents

Yamaha RX10K Owner's Manual Manual pdf 59 page image

8-4ESU00376Tool kitThe owner’s tool kit has the tools which are sufficient formost periodic maintenance and minor repair. A torquewrench is also necessary to properly tighten nuts andbolts.1 Tool kitCAUTION:@Before starting the engine, make sure that the toolkit is firmly seated in the holder and is closedsecurely.@NOTE:@If you do not have a torque wrench available during aservice operation requiring one, take your snowmobile toa Yamaha dealer to check the torque settings and adjustthem if necessary.@ESU00368Spark plug inspectionThe spark plug is an important engine component and iseasy to inspect. The condition of the spark plug can indi-cate the condition of the engine. Check the coloration onthe white porcelain insulator around the center electrode.The ideal coloration at this point is a medium to a lighttan color for a snowmobile that is being ridden normally.If a spark plug shows a distinctly different color, therecould be something wrong with the engine. For example,a very white center electrode porcelain color could indi-cate an intake track air leak or carburetion problem forthat cylinder. Do not attempt to diagnose such problemsyourself. Instead, take the snowmobile to a Yamahadealer for inspection and possible repairs. You shouldperiodically remove and inspect the spark plug becauseheat and deposits will cause a spark plug to slowly breakdown and erode. Consult a Yamaha dealer before chang-ing to a different type of spark plug.Specified spark plug:· R · CR9E (NGK) or CR9E (NGK)