2016 Polaris Ranger Crew 900 Owners Manual - Page 77

MAINTENANCE Spark Plugs Spark Plug Recommendations Refer to the specifications section beginning on page 98 for the recommended spark plug type for your vehicle. Always torque spark plugs to specification. NOTICE: Using non-recommended spark plugs can result in serious engine damage. Always use POLARIS-recommended spark plugs or their equivalent. Spark Plug Gap/Torque Electrode Gap 0.7-0.8 mm New Plug Torque 10 ft-lbs (13.5 Nm) Used Plug Torque 10 ft-lbs (13.5 Nm) Spark Plug Inspection Spark plug condition is indicative of engine operation. The spark plug firing end condition should be read after the engine is warmed up and the vehicle is driven at higher speeds. Immediately check the spark plug for correct color. CAUTION! Always remove all cargo from the cargo box before lifting the box to access engine components. 1. Lift the cargo box. Remove the spark plug cap. CAUTION! A hot exhaust system and engine can cause burns. Wear protective gloves when removing a spark plug for inspection. Spark Plugs 2. Using the spark plug wrench provided in the tool kit, remove the plug by rotating it counter-clockwise. 3. Reverse the procedure for spark plug installation. Apply anti-seize compound to the spark plug threads. 4. Torque to specification. Normal Plug The normal insulator tip is gray, tan or light brown. There will be few combustion deposits. The electrodes are not burned or eroded. This indicates the proper type and heat range for the engine and the service. The tip should not be white. A white insulator tip indicates overheating, caused by use of an improper spark plug or incorrect throttle body adjustments. Wet Fouled Plug The wet fouled insulator tip is black. A damp oil film covers the firing end. There may be a carbon layer over the entire nose. Generally, the electrodes are not worn. General causes of fouling are: incorrect spark plug type or heat range, excessive engine oil consumption or incorrect throttle body adjustments. 75