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A number of the newer sleds are now fitted with “carb heaters”. Many of these route warm engine coolant through the carb body in...

A number of the newer sleds are now fitted with “carb heaters”. Many of these route warm engine coolant through the carb body in an attempt to prevent icing of the carbs (and the resulting safety concern of a stuck throttle).

Sleds equipped with these systems typically have a valve to turn the flow of warm coolant to the carbs on and off. Normally you want the valve off for maximum performance (colder air intake temperature), but Ski-Doo tells us anytime you’re riding where there is snow in the air (riding in powder or behind a sled creating snow dust) or when the relative humidity is quite high and the air is rather warm (-5 C to 5 C, or 23 F to 41 F) you want the valve ON. Be sure to turn the valve OFF once the riding temps get any warmer than this.

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