Patent ID: 6302754
Filing Date: 2001-10-16
Classification: B63H,F01N,F01P,F02B,F02F

Abstract:
An outboard motor comprising an internal combustion engine, an exhaust guide plate being positioned generally below said internal combustion engine and including an exhaust guide passage, said internal combustion engine comprising a generally vertically extending crankshaft and a cylinder block having a pair of cylinder banks inclined relative to one another, each of said pair of cylinder banks including at least one cylinder, a cylinder head assembly enclosing said cylinder, said cylinder head assembly comprising at least one exhaust port and at least one corresponding exhaust runner, said exhaust runner being in selective communication with said exhaust port and being formed between said exhaust port and an exhaust manifold such that said engine includes two exhaust manifolds that extend in generally vertical directions, a pair of connecting exhaust conduits communicating with said exhaust manifolds and extending toward said cylinder block, said cylinder block also having a pair of passages formed therein that are in registry with said connecting exhaust conduits, said passages merging within said cylinder block into an exhaust discharge, and said exhaust discharge being coupled to said exhaust guide passage, wherein said engine further comprises a flywheel attached to said crankshaft and having an outer diameter, said exhaust discharge of said cylinder block being positioned within said cylinder block such that said outer diameter overlaps at least a portion of said exhaust discharge when viewed from the top.