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On most of those engines it is 1in" But it could also be 7/8"

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Q: What size is the shaft on a Briggs and stratton horizontal 8 hp motor?
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What is the shaft size on a Briggs and Stratton 3.5 hp horizontal shaft lawn mower motor?

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Will a crank shaft on a 11.5 hp Briggs and stratton fit in a 11 hp Briggs and Stratton?

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Why does your 5hp Briggs and stratton horizontal shaft engine lock up when the spark is in?

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