Raymarine Type 1 Pump 12volt Brand New Includes Two Year Warranty Product # M81120 The Raymarine M81120 Type 1 Hydraulic Pump 12 volt operates the boat's steering mechanism as a part of the autopilot system. It contains a precision gear pump and a check valve driven by a servo motor. This hydraulic drive is compatible with S1/S1G and S2/S2G corepacks The M81120 is designed for boats with existing hydraulic steering systems. It is used with steering systems equipped with 4.9–14 cubic inch 80cc–230cc hydraulic steering rams M81120 Features Type 1 Hydraulic Pump 12 Volt 4.9– 0.5 In3 Ram Capacity 750 Psi Maximum Stall Pressure 67In3 /Min Peak Flow Rate For Raymarine Models S1/S1G S2/S2G Series Autopilot System