Patent ID: 6821171
Filing Date: 2004-11-23
Classification: B63H,F01P

Abstract:
A cooling system for a marine propulsion device, comprising:a water pump for drawing water from a body of water in which said marine propulsion device is operated; an engine having a cylinder head and a cylinder block; an exhaust conduit connected in fluid communication with said engine to conduct exhaust gasses away from said engine; a first cooling passage disposed in thermal communication with said cylinder head; a second cooling passage disposed in thermal communication with said exhaust conduit; a third cooling passage disposed in thermal communication with said cylinder block, said first and second cooling passages being connected in series with each other and with said third cooling passage, wherein an outlet of said water pump is connected in fluid communication with said water pump to cause at least half of the water flowing through said third cooling passage to first flow through said first and second cooling passages, said first cooling passage being connected serially between said water pump and said second cooling passage; and a charge air cooler having a fourth cooling passage, said fourth cooling passage having an inlet connected to said outlet of said water pump.