Recent bore? No cross hatch? I'm afraid it could have been just a bad quickie refresh by previous owner... probably in attempt to spend low and sell high.
Looks like a do over to me....properly this time. You could start with mic on the cylinder and see where you are at for starters. Then there's crank and valve specs consider while you are at it.
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Two 125's and a 124 all with 42" decks
Plow blade
#2 Cart
QA36 snowthower
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