Polaris 2016 Ranger 570 Full-Size - Manual (Page 64)

62
MAINTENANCE
Spark Plugs
Spark Plug Recommendations
Refer to the specifications section beginning on page 84 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
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.
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.
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 excessive oil, use of non-recommended oil or poor fuel quality.
Electrode Gap New Plug Torque Used Plug Torque
0.7-0.8 mm 9 ft-lbs (12 Nm) 9 ft-lbs (12 Nm)