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Lawn mower governor spring compatibility compatible with Briggs and Stratton small engines including 12R000, 100000, 122000, 124000, 121000, 111000, 114000, check engine code and linkage before purchase. OEM cross reference accuracy lists OE 793604 and equivalents 100602-0050-H1 and 100602-0121-B1 to match factory specification and simplify selection confirm the part number on the engine label before ordering. Engine speed control function maintains stable governor tension for throttle linkage response helps regulate idle and load transitions supports smooth power delivery after maintenance or seasonal storage. Small engine repair use cases replaces stretched or broken governor spring to restore speed control suitable for walk behind mowers tillers generators and compact equipment used by homeowners and landscapers. Easy installation scenarios designed for straightforward fit with pliers follows original routing on the governor arm suits at home tune ups shop maintenance and rental fleet service includes two matched springs.