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I have a 2004 Polaris switchback that has been converted from a 700 to 800 engine. The sled runs fine on the trails but as soon as it hits powder the engine immediately cools and begins to sputter and foul spark plugs. I have tried restricting the flow of coolant as well I have changed out the...

I have a 2004 Polaris switchback that has been converted from a 700 to 800 engine. The sled runs fine on the trails but as soon as it hits powder the engine immediately cools and begins to sputter and foul spark plugs. I have tried restricting the flow of coolant as well I have changed out the...

I have a 2004 Polaris switchback that has been converted from a 700 to 800 engine. The sled runs fine on the trails but as soon as it hits powder the engine immediately cools and begins to sputter and foul spark plugs. I have tried restricting the flow of coolant as well I have changed out the...

My 2004 Polaris switchback has had an engine swap from a 700 to an 800 and am now having problems with it overcooling in powder and fouling sparkplugs. It runs fine on trails but immediately starts running cold in powder.I have changed the thermostat in hopes it was a quick fix. No such luck...