BT Marine Propellers - design, manufacture and supply of sterngear propulsion systems bt marine propellers, bt marine, propeller design, propeller manufacturers, sterngear systems, propulsion systems, inboard propellers, propeller repair, customised propellers, performance propeller, bronze propeller, aluminium propellers, custom sterngear, standard sterngear, outboard propellers, propeller modification, specialist repairs, propeller repairs, propeller reconditioning, dynamic balancing BT Marine Propellers offer a customised service which includes engineering, manufacturing and technical support. Our team of industry professionals have many years of experience in the design, manufacture and supply of fully integrated sterngear propulsion systems.