A-B1590526-AI ARM-ROCKEROne New Aftermarket Replacement Rocker Arm Fits Briggs and Stratton Small Engines This aftermarket replacement rocker arm Fits Briggs and Stratton small gasoline engines and is a key valvetrain component that transfers motion from the pushrod to the intake or exhaust valve. A worn or damaged rocker arm can cause loss of compression, misfires, or complete engine failure, making this a critical repair part for lawn mowers, riding tractors, and other