Hello, I have a Briggs flathead that I would like to convert to gas for a mini bike I have, I had bought this engine and a few other engines and parts from an estate sell. so I don’t really know much about the engine,it looks to be open modified to me but idk. I believe it ran on alky before because when I put it on my mini bike and ran it on gas it ran like crap, but sometimes when I would give it throttle it would sputter then I would let off the throttle and give it full throttle again and it would pull hard and then fall on its face. I’m new to flatheads and would like some suggestions to have this engine run right on gas. The engine has an arc #6607 flywheel, HL-360a Tilly carb and that’s about all I know because I have yet to open up the crankcase.
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