Patent ID: 6331127
Filing Date: 2001-12-18
Classification: B63B,B63H,F01N,F01P,F02B

Abstract:
A watercraft comprising a propulsion system including an engine, the engine having a body defining at least one combustion chamber therein and having at least one coolant jacket therein, an exhaust conduit communicating with the at least one combustion chamber and extending to an exhaust discharge arranged to discharge exhaust gases from the at least one combustion chamber through the exhaust conduit and to the atmosphere, the exhaust conduit having a coolant jacket in thermal communication with at least a portion thereof, a coolant supply configured to generate pressurized coolant, a cooling system defining a first coolant flow path extending from the coolant supply, in a downstream direction, through the engine coolant jacket, through a temperature dependent flow control valve, and to the atmosphere, a second coolant flow path having an inlet end connected to at least one of the coolant supply and a portion of the first coolant flow path upstream of the temperature dependent flow control valve, the second coolant flow path communicating with the exhaust conduit coolant jacket and discharging coolant to the atmosphere, the second coolant flow path not being connected to any portion of the first coolant flow path downstream of the temperature dependent control valve.