How can you stop a Polaris 500 snowmobile from overheating?

Answer 1

There are a few things that cause this. Not being sure of how long it takes before the engine overheats I will give you a few common causes. Thermostat not working properly (Mounted on top of engine where cooling hose hooks up) . Can be tested on a stove, need a pan, some water, a string, thermometer able to read over or at least 250 degrees. Open the thermostat insert an end of the string. Tie the other end of the string to the handle of the pan, as to keep the thermostat about half way up the side of the pan. Fill pan with water just pass the thermostat, and place on the stove. Bring water to a boil, before the water boils the thermostat should open and fall to the bottom of the pan, you should be checking the temp of the water with the thermometer, so you know the water temp when this happens, it should match, or be very close to the temp stamped on top of the thermostat. If water boils and thermostat does not open, get a new one. Another common cause is air in the system, there may be points in the system higher than the fill point, with today's rear suspension system this has become an issue. To fill this type sled with coolant you must raise the fill point. This can be done with a jack. or even a snowmobile trailer. With a tilt bed type, load sled, tie it down, brace the bed up, this will raise the fill point. With a ramp type, just run the sled up on the ramp. When using a trailer always have it hook up to a auto. A steep ditch , or hill will also work. Good luckCheck you **************check your water pump belt for wear/brakeage it is located behind the rewind assy, and make sure you are driving in powdered snow as driving on ice does not cool the engine because snow passes over the heat exchangers and cools the motor*************