A-B1691230-AI ARM-ROCKEROne New Aftermarket Replacement Rocker Arm Fits Briggs and Stratton (B&S) Small Engines This aftermarket replacement rocker arm fits a wide range of Fits Briggs and Stratton (B&S) small engines used in lawn mowers, generators, and outdoor power equipment. The rocker arm is a critical valvetrain component that transfers motion from the camshaft or pushrod to open and close the intake and exhaust valves. This is an old style 6mm rocker arm designed for