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I stopped drilling the main jet at 1.2mm and it will now run decently at only 1/2 choke. Full choke it is way too rich and it will surge and die. Anything less than half choke and the engine will surge but keep running. As the governer tries to maintain the proper RPM, it will spit fuel back...

OK - here are some status updates: If I pull the bowl, it will drain the tank in just a few minutes. IT IS NOT PLUGGED!! Gas is brand new - gas can I transported the gas in was dry/empty when I filled it. Retorqued head bolts per spec (19 ft-lb). They did not tighten any more than they were...

The gas is brand new and I started with a clean/dry tank. There is no moisture/water anywhere in the system. Appreciate the suggestion though.

All good ideas and I will try them tomorrow when I get home from work. To answer some of the suggestions - if I pull the bowl, gas streams out at a good pace. It does have a small bowl as suggested at the bottom of the fuel shutoff valve too. If I remove the at bowl, it provides a clean -...

Subaru – Robin SP170 engine installed in a 27 ton log splitter. It was not winterized last year and the carb was beyond recovery. Lots of rust and corrosion to the point the jets could not be removed. We threw it in the garbage and ordered a new one. After installing the new carb and it ran...