FASWORX Premium Trim Sender & Limit Switch Kit (Analog, 2-Wire) Restore accurate dash readings and protect your drive from over-extension with the FASWORX Trim Sender and Limit Switch Kit. Engineered as a premium, direct drop-in replacement for MerCruiser Alpha, Bravo, and legacy sterndrives, this kit ensures your transom assembly remains fully sealed and highly responsive. Inferior wiring compromises quickly in saltwater and constant submersion. FASWORX senders are manufactured using heavy-duty, marine-grade insulation and fully sealed internal components, designed specifically to lock out moisture and prevent the electrical shorts common in degraded OEM harnesses. At a Glance: Drive Compatibility Fits all engine displacements mated to the following analog MerCruiser drives: Alpha One (Gen II): 1991 & Newer Bravo Series (I, II, III, X): 1988 & Newer Alpha One (Gen I): 1983 – 1990 MC-I, R, MR: Prior to 1990 (Important: This is a 2-wire analog kit and is NOT compatible with Mercury SmartCraft 3-wire digital systems). Cross-Reference Part Numbers: OEM Equivalents: 805320A03, 805320A1, 17693A2, 96863A15, 63115A12, 88678A4, 88678A5, 99122A6 Aftermarket: Sierra Marine 18-7633 Installation Best Practices: To guarantee the watertight integrity of your boat's transom assembly, it is highly recommended to replace both the port-side trim limit switch and the starboard-side trim sender simultaneously as a pair.