Some just use a heater to keep your coolant warm and flowing through the engine. I guess getting one couldn't hurt, what kind of temps does your area experience at night on average? Cuz if it isn't very cold I wouldn't bother, if it's that big of a deal you could always put her in the garage?
Sounds like the same type of block heater used in cars? I know my car won't start unless it's had the block heater on when it's colder than -20 C.
It'll probably make the sled easier to start and it will reach operating temp faster. It will pollute less on start and could probably make the engine last a little longer if it gets really cold.
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