MaySpare 12V Power Trim Solenoid Switch 2‑Pack for Mercury/Mariner 35–275HP — High‑Temp Copper Coil, Direct-Fit

MaySpare 2PCS 12V Power Trim Solenoid Switch replaces Mercury/Mariner power trim relays for 35–275 HP outboards and MerCruiser stern drives.

These two 12V solenoid switches are designed as direct-fit replacements for worn or faulty power trim relays on many Mercury, Mariner and MerCruiser engines. Built with a high-temperature copper coil and a reinforced plastic housing, they restore electrical control to your trim and tilt system without complex rewiring. Each unit uses four terminals and a flat mounting bracket to match original equipment footprints and simplify installation.

What motors and part numbers are these solenoids compatible with?

These solenoids are intended for a broad range of Mercury and Mariner outboards and MerCruiser stern drives rated roughly 35–275 HP. They specifically replace common OEM part numbers for power trim relays, making them suitable when the original part numbers match.

• Compatible part numbers: 89-846070, 89-94318, 89-96158, 89-96158T, 89846070.
• Fits many Mercury and Mariner outboard models and MerCruiser stern drive applications.
• Rated for engines in the approximate 35–275 HP range; verify your exact OEM number before ordering.

How durable is the MaySpare solenoid and what materials are used?

The solenoid coil uses 180°C-rated copper wire for improved heat tolerance and electrical reliability. The outer shell is a robust plastic formulation that increases resistance to heat and mechanical wear compared with standard housings, extending service life in marine environments.

• High-temperature copper coil rated to 180°C for sustained electrical performance.
• Durable plastic housing designed for higher heat and wear resistance.
• Plated terminals and screw points to resist corrosion in marine settings.

How simple is installation and what electrical connections are provided?

Installation is straightforward when matching OEM part numbers and mounting holes; the unit includes a flat bracket and four terminal posts for common wiring layouts. It replaces relay units without requiring special tools beyond basic hand tools and a few electrical connectors.

• Four terminals including 1/4-20 threaded motor and battery posts for secure connections.
• 8-32 grounding and screw terminals for control wiring and ground paths.
• Flat mounting bracket aligns with most factory mounting locations for a direct fit.

What should I expect in terms of performance and service?

When installed correctly, the solenoid restores normal trim and tilt actuation by reliably switching the high-current circuit between battery and motor. While not a factory part, the design aims to match OEM electrical and mechanical interfaces for dependable operation under typical boating conditions.

• Reliable switching of trim/tilt high-current circuits on 12V systems.
• Supplied as a two-piece set to replace both forward and aft or twin-motor applications.
• Manufacturer support available—contact MaySpare for questions or assistance.

Who is this for: Boat owners, marine mechanics, and DIY enthusiasts who need a practical, cost-effective replacement for failing power trim solenoids on compatible Mercury, Mariner or MerCruiser outboards and stern drives. Verify your engine’s OEM part number and 12V system compatibility before purchasing to ensure a correct fit and straightforward installation.