Patent ID: 6343966
Filing Date: 2002-02-05
Classification: B63H,F01P

Abstract:
A marine propulsion system, comprising:an internal combustion engine having a liquid cooling system; a drive unit of said marine propulsion system which is at least partially submersible in a body of water in which said marine propulsion system is operable; a water pump, within said drive unit, having a water inlet and a water outlet, said water inlet being disposable in fluid communication with said body of water and said water outlet being disposed in fluid communication with said liquid cooling system of said internal combustion engine; an electric motor having a rotor connected in torque transmitting relation with a rotatable member of said water pump; an engine controller, comprising a microprocessor, which is connected in signal communication with said electric motor; and a first sensor connected in signal communication with said engine controller, said engine controller controlling the operating speed of said electric motor as a function of a first parameter sensed by said first sensor.