HNeekyr 12V Trim Solenoid Starter for Mercury/Mariner Outboards — Pair, 35–275 HP, 180°C Copper

HNeekyr 12V trim solenoid starter is a direct-fit replacement for many Mercury/Mariner outboard and MerCruiser stern drive applications from 35–275 HP.

If your outboard’s trim or tilt action is slow, intermittent, or non-responsive, a faulty trim solenoid is often the most likely cause. This HNeekyr 12V power trim solenoid is built with heavy-gauge 180°C copper windings and a robust plastic housing to provide reliable conductivity and long-lasting operation. It ships as a pair and is designed to meet original-equipment fit so you can swap it into the existing mounting and wiring without custom fabrication.

How do I know this solenoid fits my Mercury or Mariner outboard?

Check the engine model and horsepower range first; this unit covers a wide span of Mercury/Mariner outboards and compatible MerCruiser stern drives. Compare the OE numbers on your old part with the replacements listed below to confirm fitment before ordering.

• Compatible with Mercury/Mariner outboards from 35 HP up to 275 HP and 3.7L engines
• Works with MerCruiser stern drives and SAE J1171 marine trim pumps
• Cross-references OE numbers: 89-846070, 89-94318, 89-96158T, 89-818864T, 89-96158 and numeric variants
• Ideal when your existing solenoid looks similar in mounting, terminals, and size

What are the construction and electrical details of this 12V trim solenoid?

The HNeekyr unit uses high-temperature 180°C copper winding for consistent electrical performance and a sturdy molded plastic body for corrosion resistance in marine environments. It’s engineered to meet OE-style specifications so electrical and mechanical interfaces align with your boat’s original part.

• 180°C copper wire for improved conductivity and heat tolerance
• Durable plastic housing to resist saltwater exposure and vibration
• 12V coil designed for standard marine electrical systems
• Sold as a set of 2 pieces for dual installations or spare replacement

How difficult is installation and what tools are required?

Installation is straightforward and intended as a direct replacement—no drilling or fabrication is needed in most cases. Basic hand tools and standard marine wiring practices are usually all that’s required, making it a feasible DIY job for boat owners comfortable with routine maintenance.

• No special tools or drilling required; fits original mounting points
• Quick swap of wiring terminals and mounting bolts in minutes
• Follow safe battery-disconnect procedures before beginning work
• Refer to OE part numbers to ensure exact terminal arrangement

Who is this product for? Boaters, mariners, and marine technicians who need a reliable, OE-style replacement for failing trim/tilt solenoids on Mercury/Mariner outboards (35–275 HP) and compatible MerCruiser stern drives. It’s suited to owners who want a cost-effective, easy-to-install spare or replacement that restores consistent trim operation without custom modifications. If you operate in saltwater, maintain regular corrosion checks and connect with correct wiring to preserve longevity.