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Both valves open right at 1/8”

Yes sorry, I realize my “looks good” answer was probably mistaken as an eyeball guess haha. But both gaps do measure within spec. I actually went back in and checked them again thinking I didn’t have enough coffee prior, but they were spot on.

Good call, but yes, it has a champion that looked good, I swapped it anyways with a new one and no change.

I’ll check that out and report back. Thanks for the reply!

So here’s the deal. 2019 Briggs 33R777 0012 G1 fires right up every time. Runs rough and pops at high rpm (although it won’t get nearly as high as it should) but runs smooth at low RPM. I’ve both cleaned the OEM carb and replaced the carb, same issue. Valve clearance is good on intake & exhaust...