2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 92Get this manual

2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 92

COOLING SYSTEM THERMOSTAT Removal (Engine Installed) 123Drain coolant so the coolant level is below the thermostat housing
4Remove the (2) screws and lift the housing up far enough to remove the thermostat with the coolant line still attached Water
pump failure Loose impeller Engine Coolant Temperature Sensor failure Cooling fan inoperative or turning too slowly (perform
current draw test) Low oil level Spark plug incorrect heat range Faulty hot lamp circuit Thermostat stuck closed or not opening
completely Installation 1Install the thermostat, thermostat cover, and the (2) screwsTorque screws to specification Temperature
Too Low Thermostat stuck open 89 inlbs(10 Nm) Leak at Water Pump Weep Hole Faulty water pump mechanical seal Worn pump shaft