I have a generator with a Tecumseh HM 100 159409R. I bought this new. It has always run terrible. Pops and surges. It actually works better under load. It is a fixed jet. I have heard everything from drill out the small hole in the main jet to replace the carb with an adjustable jet carb. It has a 640260 carb. Do they make a carb that will bolt up the same that I can adjust? I haven't found one yet.
HM 100
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