this part is from old carb. engine.
for carb. engines temperature of intake air must be not less than +35C, becouse gasoline evaporate in carb, this lowering temperature and can be icing on some carb. details.
but for modern injection engines i think +35C is too hot, i plan to readjust thermostate to +20C.
i check accuracy of my thermostate, it is about +/- 1C
engines was 1.1 - 1.6 L.
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