Patent ID: 6276327
Filing Date: 2001-08-21
Classification: F02B

Abstract:
An outboard motor including an internal combustion engine, an exhaust guide, and a lubrication system including a lubricant reservoir that is located below the exhaust guide, the engine comprising a cylinder body defining a plurality of cylinder bores in which pistons reciprocate, said pistons being coupled to a crankshaft that is covered by a crank case forming a crank chamber, a cylinder head affixed to an end of said cylinder body and defining combustion chambers with said pistons and said cylinder bores, a plurality of air intake passages supplying air charges to said combustion chambers, a plurality of exhaust passages for discharging burnt charges from said combustion chambers, the intake and exhaust passages being located on the same side of the cylinder body, at least one crank chamber lubricant return passage communicating with said crank chamber and said lubricant reservoir, said return passage being located on the same side of the cylinder body as said intake and exhaust passages, an opening of said crank case return passage being located at least in part on a substantially vertical side wall of said crank case.