"All over the map with its revving".... meaning as the engine is surging back and forth because the governor is chasing? Did I read that correctly? Usually the cause of this is lean condition. Usually adjustments to carb will help that but do make sure fuel flow is ample and that there are no intake leaks.
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Two 125's and a 124 all with 42" decks
Plow blade
#2 Cart
QA36 snowthower
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