This video provides step-by-step repair instructions for replacing the spark plug on a Briggs and Stratton small engine (which is commonly found in lawn mowers, riding tractors, zero-turn radius mowers, wheeled edgers, pressure washers, and generators). The most common reasons for replacing the spark plug are when the engine won’t start, is hard to start, stops after a few seconds, or runs poorly.
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Spark plug part testing video:
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All of the information for this spark plug replacement video is applicable to the following brands:
Briggs & Stratton, Toro, John Deere, Lawn Boy
Tools needed: socket/spark plug wrench
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