Lubricating system for outboard engine
AssigneesYamaha Hatsudoki Kabushiki Kaisha, Sanshin Kogyo Kabushiki Kaisha
InventorTomio Iwai
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Abstract
An improved lubricating system for a two-cycle outboard motor having a vertically extending crankshaft. The lubricating system employs a crankshaft driven pump and circulating system that permits pressure lubricating without necessitating elongation of the crankshaft or engine. The engine is enclosed within a cowling and an oil sump is conveniently located within the cowling and is accessible through a cover door of the cowling for replenishment of the oil supply without removal of the cowling.
Claims5
A lubricating system for a crankcase compression, two-cycle, multi-cylinder engine having a vertically disposed crankshaft rotatably supported in a crankcase divided into at least an upper chamber and a lower chamber, seal means cooperating with said crankshaft for sealing said uppper crankcase chamber from said lower crankcase chamber, an oil pump drive means affixed to said crankshaft in said lower chamber contiguous to said seal means, means for delivering pressurized oil from the oil pump driven by said oil pump drive means to said oil pump drive means and therefrom to at least some of the moving components within said lower crankcase chamber.
Dependencies are inferred from the claim text.