Fishability
New member
I replaced the carb, run clean gas and I still have this black soot coming from exhaust. This is after running at low speed for 8 hours.
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Gotta be running rich, or does it use any oil? Does it run smooth at all speeds? Will it start cold without choking it? What year is it? Might be low compression too. Thermostat? Running too cold could cause this problem too. Shoot it with an infrared gun....see what you get.