Re: Heat riser crossover?
You have to remember that the carb is a self cooling object. What I mean is that the venturi action cools the carb down, regardless of weather and engine heat. Carb icing is a serious problem on aircraft (and snowmobiles) even when outside temperatures are above freezing. Place your hand on the side of a carburetor while the engine is running and feel how damn cold it gets.
Hot carbs and fuel evaporation result from "heat soak" after you turn the engine off which is why an insulating base plate works so well.
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