Patent ID: 6766780
Filing Date: 2004-07-27
Classification: F02B,F02M

Abstract:
An outboard motor having a four-stroke engine, comprising:a generally vertically extending crankshaft; at least one cylinder block and a skirt constituting a crankcase for housing the crankshaft, the cylinder block having a plurality of generally horizontal cylinders; a cylinder head connected to a rear surface of the cylinder block opposite the skirt to form a plurality of combustion chambers in the cylinders; an exhaust passage provided at one side of the cylinder head in communication with the combustion chambers; an intake passage provided at another side of the cylinder head in communication with the combustion chambers; and an intake silencing box provided above the cylinder block in communication with the combustion chambers via the intake passage, the intake silencing box having an air induction passage disposed forward of the exhaust passage and extending vertically downwardly between the exhaust passage and the skirt of the crankcase in a suspended fashion, the air induction passage having an air inlet opening downwardly.