Home › Forum › Ask A Member › How hot should a HD25 run? › Re: How hot should a HD25 run?
July 4, 2017 at 3:06 pm
#60962
Because the carburetor and exhaust manifold are the same part, running too hot overheats the carburetor, making the fuel vaporize inside. This will show up as surging, among other things.
A common cause is the rubber seal mushing over the end of the water tube, at the water pump.