2013 Kawasaki JET SKI Ultra LX Owners Manual - Page 141

MAINTENANCE AND ADJUSTMENTS 139 NOTICE Excessive operating temperature can cause serious engine damage. To prevent engine damage, the cause for any excessive operating temperature should be located and corrected immediately. A dry, sooty black deposit on the insulators indicates an overly rich fuel/air mixture. Check for correct throttle control cable adjustment. Refer to the TROUBLESHOOTING GUIDE. Clean the electrodes and the ceramic insulators around the center electrode by scraping off any deposits or by using a sand blasting device. Make sure that all abrasive particles are removed from the plug and clean the plug in a high flash-point solvent. If the gap has widened, reset it to the standard gap. If the electrodes are badly worn or burned, replace the plug. The spark plug must also be replaced any time there is visible damage such as cracked ceramic or damaged threads. Tightening Torque: 13 N·m (1.3 kgf·m, 115 in·lb) j A. Terminal (Threaded) B. Plug Gap Spark Plug Inspection and Replacement Remove the spark plugs and inspect the ceramic insulators. The appearance of the insulators reflects the efficiency of the combustion process. When the engine is operating properly, the plug insulators should be clean and show a light brown color. If the insulators look glazed or very white, if the electrodes appear overheated, or if there are gray metallic deposits on the plugs, combustion chamber temperatures are too high. Refer to the TROUBLESHOOTING GUIDE. Spark Plug Fitting the plugs into the plug holes. • Insert the plugs with the specific torque. • Tighten the spark plug caps onto the spark plugs • Install securely.