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carb float issue?

lemur's Avatar

Join Date: Jul 2014
Posts: 1

07-13-14, 07:15 PM   #1  
carb float issue?

I have an old Craftsman 917.255850 lawn tractor with a 16hp B&S engine. It was running rough, so I followed advice seen many times in this forum. Take apart and clean carburetor. Worked like brand new, for a while. Engine began racing and slowing on its own and throttle cable became very stiff. Opened hood to see air cleaner housing completely loose and discovered the two screws holding the bracket had fallen in the carb. D.A. that I am, forgot to tighten them. OK, I see excessive gasoline now in the intake manifold and it runs poorly. My question is, if the float bowl becomes completely full of gasoline, will it ever clear itself or does the carb have to be taken apart and drained? And will a flooded float chamber cause rough running with low power under load and a flooded intake manifold?

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cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,570

07-13-14, 07:26 PM   #2  
Yes, if it is flooding, it will run poorly. If the needle and seat are not sealing properly, it will keep flooding. If the bowl is overfull, usually that is because the needle is leaking and it needs to be addressed.

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