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I wanted to ask this question before I pull this thing apart and dig into the carb. Very seldom used for a couple years but took it out the other day and it ran like crap. Blows black smoke on throttle (unburnt fuel) and sound like a multi cylinder engine with a misfire. Won't rev very high on full throttle but seems to be smooth at about 1/3 or less throttle. Choke doesn't seem to do anything and thinking perhaps it's stuck closed. If I turn off the fuel and let it run for a minute It will rev like normal under full throttle until it stalls out from no fuel but as soon as I open the fuel line again it goes right back to running rich/flooding. Any help or ideas would be great. Trying to avoid tearing it apart and rebuilding the carb but the only thing I can think is the choke is stuck cause with the fuel off it will rev just fin seemingly as it's emptying the float bowl.