The Raymarine Type 1 Reversing Hydraulic Pump is designed for boats with steering systems equipped with 4.914 cu. in. (80cc - 230cc) hydraulic steering rams. The Type 1 hydraulic drive is compatible with both S1/S1G and S2/S2G core packs. SPECIFICATIONS:* Part#: M81120* Maximum Stall Pressure: 50 bar (750 psi)* Peak Flow Rate (No Load): 1, 000 cc/min.* ACU Used: ACU-150 Maximum stall pressure: 50 bar (750 psi) Peak flow rate (no load): 1, 000 cc/min. ACU used: ACU-150 | Type 1 Reversing Hydraulic Pump - 12V