PRECISE FITMENT: Direct replacement for Mercury/MerCruiser part numbers 8M0052936, 87-8M0052936, 808009A3, 808009A1, 808009A13, 17514A2. Engineered specifically for MerCruiser Alpha One (Gen 1 & Gen 2) and Bravo I, II, & III sterndrives. WIDE ENGINE COMPATIBILITY: Fits a broad range of MerCruiser gas engines, including 3.0L, 4.3L, 5.0L (305), 5.7L (350 Mag), 6.2L MPI, 377, 383 Stroker, as well as Big Block 7.4L (454), 8.1L (496), and 8.2L (502) models. RESTORES SMOOTH SHIFTING: Solves common shifting frustrations such as engine stalling when shifting into gear, gear grinding, or difficulty returning to neutral. This switch momentarily interrupts ignition to reduce torque for a seamless shift. DURABLE MARINE-GRADE BUILD: FASWORX parts are built to withstand harsh saltwater and freshwater environments. This heavy-duty "Hole Mount" style switch features a high-impact housing and corrosion-resistant terminals for long-lasting reliability. EASY INSTALLATION: Designed for a standard "round hole" mounting bracket found on most 1990–Present MerCruiser shift plates. Note: Please verify your current switch uses a round mounting hole; if your switch has a sliding adjustment slot, you require part number 808009T10. Restore Seamless Performance to Your MerCruiser Sterndrive If your boat is stalling when you shift into gear, grinding during transitions, or getting stuck in gear, your shift interrupter switch is likely the culprit. The FASWORX 8M0052936 Shift Interrupter Switch is a high-quality, marine-grade replacement designed to restore smooth, effortless shifting for MerCruiser Alpha and Bravo applications. Why the Shift Interrupter Matters MerCruiser sterndrives require a momentary "stumble" in engine ignition to relieve torque on the drive gears. This allows the shift cable to move the gears freely without binding. Our FASWORX switch is precision-engineered to provide that exact timing, preventing damage to your transmission and ensuring a reliable day on the water. Broad Compatibility (1990–Present) This "Hole Mount" style assembly is the standard replacement for nearly all MerCruiser gas engines paired with Alpha One (Gen 1 & 2) and Bravo I, II, & III drives. Small Block: 3.0L, 4.3L, 5.0L (305), 5.7L (350 Mag), 6.2L MPI, 377, 383 Stroker. Big Block: 7.4L (454), 8.1L (496), 8.2L (502). The FASWORX Difference At FASWORX, we specialize in aftermarket marine parts that meet or exceed OEM specifications. We understand the harsh conditions of the marine environment, which is why our switches feature: - Corrosion-Resistant Terminals: To prevent signal loss in saltwater or high-moisture environments. - High-Impact Housing: Built to withstand the heat and vibration of your engine compartment. - Direct Plug-and-Play Fit: Designed to bolt directly onto your existing shift plate. Fitment Note: This switch features a Round Mounting Hole. Please check your current shift plate bracket before ordering. If your current switch is mounted on a sliding "slot" or "track," you will need part number 808009T10 instead. Replaces Part Numbers: Mercury / MerCruiser: 8M0052936, 87-8M0052936, 808009A3, 808009A1, 808009A13, 17514A2.