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The Craftsman Walk Behind Mower 917.370910 is a self-propelled, gas-powered lawn mower with a 22-inch cutting deck. It offers variable speed rear-wheel drive, and can be adjusted to 7 different cutting heights. It's capable of mulching, bagging, or side discharging grass clippings, and features a foldable handle for compact storage. This page provides detailed information and instructions for repair and maintenance.

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What is the right replacement spark plug for this mower

What is the right replacement spark plug

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@jefftodd for a 917.370910 the Sears recommended plug is a Champion RJ2YXLE gapped at .030"

Briggs and Stratton uses the B&S 591868 which is a Champion RJ19LM (868). Either one of those will work. Yes, others too for as long as they cross reference to the Champion plugs.

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Jeff Todd will be eternally grateful.
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