ARCO Marine Original Equipment Quality Replacement Solenoid f/Mercruiser & Mercury - Isolated base, 12V

The ARCO Marine Original Equipment Quality Replacement Solenoid for Mercruiser & Mercury is the dependable electrical heart your engine needs when the original fails. After years on the water, any angler or boater knows that a faulty starter solenoid can leave you dead in the water—stranded far from the ramp with no way to fire up the engine. This isolated-base, 12-volt unit restores instant ignition reliability to Mercruiser and Mercury outboard systems, ensuring you spend more time fishing and less time troubleshooting electrical gremlins.

Built to original equipment specifications, this solenoid features a white housing with an isolated base design that minimizes electrical noise and crosstalk—critical for clean starting signals in modern marine electronics environments. The 12-volt configuration delivers the precise engagement force needed to crank your engine reliably in both calm mornings and heavy seas. At just 0.35 pounds and compact 3 x 3 x 4-inch dimensions, it mounts seamlessly in the engine bay without modification, directly replacing Mercury part number 89-818864 and equivalent Mercruiser solenoids. The isolated base protects sensitive onboard systems from voltage spikes, keeping your fish finder, GPS, and other electronics running smoothly.

Whether you're running a center console, cuddy cabin, or open skiff powered by Mercury or Mercruiser, this solenoid is the OEM-quality replacement that serious boaters trust. DIY installation takes minutes for those comfortable with basic marine electrical work, and compatibility is guaranteed on all supported 12-volt systems. Stock one in your spare parts locker—engine reliability in remote anchoring situations depends on having the right replacement ready when your original solenoid wears out.