Navico Pump-4 MK2 Reversible Hydraulic Autopilot Pump - 12V

Enhance Your Boat's Autopilot with Reliable Hydraulic Power

Imagine cruising through choppy waters with confidence, knowing your autopilot delivers precise, effortless control without constant manual adjustments. The Pump-4 MK2 stands out as a robust reversible hydraulic pump designed for marine enthusiasts who demand durability and performance. This 12V unit powers hydraulic steering systems seamlessly, handling cylinder displacements from 290 to 960 cc—perfect for mid-sized vessels like sportfishers, cruisers, and offshore boats.

What sets it apart is its high-flow design at 3.0 liters per minute, ensuring quick response times and smooth operation even under load. Built to withstand the harsh marine environment, it integrates effortlessly with advanced autopilot setups, making long passages safer and more enjoyable.

Key Features That Deliver Superior Performance

• Reversible Operation: Switches direction instantly for full bidirectional control, ideal for dynamic course corrections.
• High Flow Rate: Pumps 3.0L/min (183 cubic inches/min) to minimize lag and maximize steering efficiency.
• Versatile Sizing: Matches cylinders from 17.7 to 58.5 cubic inches, covering a wide range of hydraulic rams without compromise.
• Secure Connections: O-Ring Boss (ORB) ports with included adapters (ORB-5 to 9/16 UNF) for leak-free, easy plumbing.
• Compact and Efficient: 12V DC power draw suits standard boat electrical systems, with low noise and vibration for comfortable onboard life.

These features translate to real-world reliability: faster tack adjustments during sailing races or steady tracking in heavy following seas for fishing charters.

Seamless Integration for SteadySteer Systems

Engineered for compatibility with SteadySteer technology, this pump pairs perfectly with NAC-3 computer and AC-42 autopilot actuators. Unlock continuous steering refinements that adapt to sea state, wind shifts, and load changes—reducing crew fatigue on extended voyages. It's a game-changer for vessels where autopilot precision directly impacts safety and speed.

Whether retrofitting an existing hydraulic setup or building a new one, its plug-and-play fittings simplify the process. Boaters report noticeable improvements in holding course during beam seas, thanks to the pump's responsive hydraulic delivery.

Installation Tips for Optimal Results

Position the pump in a dry, accessible spot below deck, ideally close to the steering cylinder to shorten hose runs and reduce pressure loss. Use marine-grade hydraulic fluid and bleed the system thoroughly after install to avoid air pockets that could cause erratic steering.

Pro tip: Mount it with vibration-dampening brackets to extend lifespan amid engine thrum and wave impacts. Most installations take under a day for experienced mechanics, with straightforward wiring to your 12V bus.

Built to Last in Demanding Conditions

Crafted from corrosion-resistant materials, the Pump-4 MK2 thrives in saltwater exposure, UV rays, and temperature swings. Its gear-driven design ensures consistent flow without overheating, even during prolonged autopilot use. Regular checks on seals and fluid levels keep it humming for years, often outlasting lesser pumps in fleet applications.

Boat owners praise its quiet operation—no more distracting whines from high-pressure pumps—allowing focus on navigation and angling.

What's Included for Hassle-Free Setup

• Pump-4 MK2 12V reversible hydraulic pump
• Three ORB-5 to 9/16 UNF fittings for universal hose compatibility

Everything you need to get steering straight out of the box, minus hoses and fluid—standard marine shop staples.