Side-power now offers a complete external stern thuster assembly, specially designed for installation on boats with twin stern drives. It utilizes special cowls to enable good performance by diverting the water flow past the stern drive legs, which normally blocks the water flow & the thrust. The units come pre-assembled, wired & sealed in the waterproof box & only require a small hole into the boat's transom to attach the power & control cables. The cable connection points are fully sealed, so that it is ignition protected & can be installed in petrol powered boats. This stern thruster option can also be the best choice for boats without stern drives, if the inside configuration of the boat's stern makes a standard thruster installation impractical. Perfect choice for boats where the inside configuration of the boat's stern makes a standard thruster installation impractical When fitted with the optional cowls, the stern thruster assembly is perfect for boats with twin stern drives The special cowls enable good performance by diverting the water flow past the stern drive legs which normally blocks the water flow & the thrust Pre-assembled thruster unit in a rugged GRP casing for simple external installation Waterproof & ignition protected: can be installed in gasoline-powered boats Requires only small holes in the boat's transom for power/control cables & mounting Serviceable when boat is lifted (refitted with new O-ring seal) Boat Size: 35 to 48' Internal Tunnel Diameter: 185mm Power: 4.4kW at 10.5VDC Propulsion System: Twin Minimum Battery Capacity: 1045 CCA SAE