Lubricating system for an outboard engine

In a lubricating system for a two-cycle, crankcase compression internal combustion engine having a cylinder block, a cylinder head affixed to said cylinder block, a crankshaft supported for rotation about a vertically extending axis within a crankcase affixed to said cylinder block, a cylinder bore formed in said cylinder block and extending substantially perpendicularly to said vertically extending axis, a piston reciprocally supported in said cylinder bore, and connecting rod means operatively connecting said piston to said crankshaft for driving said crankshaft, the improvement comprising an oil pump positioned externally of said crankcase and said cylinder block for lubricating portions of said engine, said oil pump having a drive shaft extending perpendicularly to a plane containing said crankshaft axis and to said cylinder bore axis and driven by said crankshaft.

In a lubricating system for a two-cycle outboard motor having an engine and a surrounding cowling adapted to be carried at the upper end of a drive shaft housing, the improvement comprising an oil supply tank separate from said engine supported within said cowling above said drive shaft housing for supplying oil to the engine lubricating system and means in said cowling for permitting replenishment of the oil in said oil tank without requiring or removing said cowling.

In a lubricating system for a two-cycle, crankcase compression internal combustion engine having a cylinder block, a cylinder head affixed to said cylinder block, a crankshaft supported for rotation about a vertically extending axis within a crankcase affixed to said cylinder block, a cylinder bore formed in said cylinder block and extending substantially perpendicularly to said vertically extending axis, a piston reciprocally supported in said cylinder bore, and connecting rod means operatively connecting said piston to said crankshaft for driving said crankshaft, the improvement comprising an oil pump positioned externally of said crankcase and said cylinder block for lubricating portions of said engine, said oil pump having a drive shaft extending perpendicularly to a plane containing said crankshaft axis and driven by said crankshaft and means for delivering oil to said engine for its lubrication.

In a lubricating system for a two-cycle crankcase compression internal combustion engine having a cylinder block, a cylinder head affixed to said cylinder block, a crankshaft supported for rotation within a crankcase affixed to said cylinder block about a vertically extending axis by at least vertically spaced upper bearing means and lower bearing means, the improvement comprising an oil supply tank mounted externally of said cylinder head, cylinder block and crankcase, oil pump means supported externally of said cylinder head, cylinder block, oil supply tank and crankcase and driven directly by said crankshaft by a gear affixed for rotation to said crankshaft and an intermeshing gear affixed to a drive shaft of said oil pump means, means for delivering oil from said external oil supply tank to said oil pump means and conduit means extending from said oil pump means to deliver oil to said engine for its lubrication.