Patent ID: 6427658
Filing Date: 2002-08-06
Classification: F02B

Abstract:
An outboard motor comprising:an engine holder; an engine disposed above the engine holder in a mounted usable state of the outboard motor; an oil pan disposed below the engine holder; and an engine cover covering the engine holder, the engine and the oil pan, said engine being an in-line multi-cylinder type and comprising: a crankcase including a crank chamber in which a crankshaft extends vertically perpendicularly; a cylinder block disposed rear side of the crankcase; and a cylinder head disposed rear side of the cylinder block, wherein said engine includes a plurality of vertically arranged cylinders and a crank chamber of a crank case corresponding to a lowermost cylinder has both shoulder portions each formed by a wall section continuous to a wall section of the lowermost cylinder and extending in a direction normal thereto and another wall section substantially parallel to the wall section of the lowermost cylinder so as to define shapes of said shoulder portions to be substantially square in section.