There is no "exhaust tube" on a carb. if you mean the overflow tube at the very bottom of the carb, then you need to disassemble the carb and clean here(and everywhere else too while you've got it apart) this will most likely fix all of your problems.
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There is no "exhaust tube" on a carb. if you mean the overflow tube at the very bottom of the carb, then you need to disassemble the carb and clean here(and everywhere else too while you've got it apart) this will most likely fix all of your problems.
It's bogging it's probably running way too rich and in need of pilot screw adjustment on the carb