SeaStar HH5261-3 Rear Mount 1.7 Hydraulic Marine Steering Helm Behind Dash Mounting Configuration with Remote Fill Point Positionable Stainless Steel O-Ring (ORB) Fittings for easy hose routing Compact helm has only a 4-7/16 footprint and needs only a 3 dash hole 4.9 turns lock-to-lock in most typical single cylinder outboard applications INSTALLATION NOTE: Do NOT attempt to install an NPT pipe fitting into a -3 helm hose fitting port. Doing so will lead to irreparable damage to the helm