Raymarine Type 1 Pump 12V - M81120

The Raymarine Type 1 Pump 12 V – M81120 is a marine‑grade reversing hydraulic autopilot pump designed for boats with traditional hydraulic steering systems. It works with compatible Raymarine autopilot corepacks (such as S1/S1G and S2/S2G paired with ACU‑150 or ACU‑200 controllers) to convert autopilot commands into hydraulic flow, giving you reliable hands‑off steering control in challenging sea conditions. This pump delivers responsive steering performance and is engineered for durability, long service life, and smooth integration into hydraulic autopilot installations. 

🔧 Technical Specifications

General

• Model: Raymarine Type 1 Pump 12 V (M81120)

• Type: Reversing hydraulic autopilot pump for marine applications 

• Power: 12 V DC (marine electrical system) 

• Mounting: Floor mount recommended (rigid and secure) 

• Weight: ~5.6 lbs (2.54 kg) 

Hydraulic Performance

• Ram Compatibility: Fits hydraulic steering rams ranging 4.9 – 14 cu in (80 – 230 cc) 

• Maximum Stall Pressure: 750 psi (50 bar) at 12 V (high‑pressure steering control) 

• Peak Flow Rate: 67 in³/min (1000 cc/min) no‑load flow for responsive steering adjustments 

Compatibility

• Corepacks: Supports S1/S1G and S2/S2G autopilot corepacks with appropriate ACU units (e.g., ACU‑150, ACU‑200) 

• Steering Systems: Designed for vessels with existing hydraulic rudder steering systems – not for direct‑drive or electric steering setups

⭐ Key Features

• Reliable 12 V reversing hydraulic pump optimized for autopilot integration 

• Works with Raymarine smart hydraulic steering systems and corepacks 

• 750 psi stall pressure and 1000 cc/min peak flow for precise steering response 

• Supports hydraulic rams 80 – 230 cc (4.9 – 14 in³) – suitable for a range of boat sizes 

• Marine‑grade build for corrosion resistance and long service life