Cooling arrangement for engine

An outboard motor having a power head comprised of an internal combustion engine positioned within a cowling thereof, said engine comprising a cylinder block having a cylinder head connected thereto and defining therein at least one combustion chamber, an exhaust passage leading from said combustion chamber through said cylinder head to an exhaust manifold formed separately from said cylinder block and said cylinder head, said exhaust manifold having an exhaust passage leading therethrough to an exhaust pipe for discharge of exhaust gasses to the atmosphere, said engine further including a cooling system, said cooling system comprising a coolant pump for passing coolant through a coolant path comprising a coolant jacket positioned about said exhaust manifold for cooling said exhaust manifold, a coolant passage leading to an engine body cooling system comprised of coolant jackets formed in said cylinder head and said cylinder block for cooling said head and block, and a coolant passage leading from said engine body cooling system to a coolant passage extending along said exhaust pipe for cooling said exhaust pipe.