Mark J Walter

US Patent:

54946131, Feb 27, 1996

Filed:

Oct 5, 1994

Appl. No.:

8/318364

Inventors:

William B. Rush - Antioch IL
Mark A. Walter - Round Lake Beach IL
Henry C. Billingsley - Kenosha WI

Assignee:

Outboard Marine Corporation - Waukegan IL

International Classification:

F02M 7093

US Classification:

261 342

Abstract:

Disclosed herein is a carburetor including a member defining an air induction passage including a downstream portion, an upstream portion, and a venturi located between the downstream portion and the upstream portion, a member defining a fuel chamber, a fuel well located in the air induction passage defining member, extending in the fuel chamber, and communicating with the fuel chamber, a high speed nozzle located in the fuel well and communicating with the venturi, and an enrichment fuel pump including a cover fixed to the fuel chamber defining member, a diaphragm located between the cover and the fuel chamber defining member and defining a fuel pumping chamber and a variable pressure chamber, a duct communicating between the variable pressure chamber and the downstream portion of the air induction passage downstream of the throttle valve, an inlet conduit communicating between the fuel chamber and the fuel pumping chamber and including an inlet check valve permitting in-flow into the fuel pumping chamber and preventing out-flow therefrom, and an outlet conduit communicating between the fuel pumping chamber and the fuel well and including an outlet check valve permitting out-flow from the fuel pumping chamber and preventing in-flow thereto.

US Patent:

54639905, Nov 7, 1995

Filed:

Oct 5, 1994

Appl. No.:

8/318368

Inventors:

William B. Rush - Antioch IL
Martin J. Mondek - Wonder Lake IL
Donald K. Sullivan - Ridgeland SC
Mark A. Walter - Round Lake Beach IL
Lawrence E. Zdanowicz - Waukegan IL

Assignee:

Outboard Marine Corporation - Waukegan IL

International Classification:

F02F 700

US Classification:

123195P

Abstract:

Disclosed herein is an outboard motor comprising a cylinder block including a lower horizontal drive shaft housing mounting surface, and a cylinder head mounting surface extending upwardly from the drive shaft housing mounting surface, a drive shaft housing including a peripheral outer surface including an upper end, a cylinder block mounting surface at the upper end, and a portion extending rearwardly from the cylinder block mounting surface and having therein a vertically open bore located forwardly of the outer surface, and a cylinder head comprising a cylinder block mounting surface fixed to the cylinder head mounting surface and including vertically spaced first and second recesses adapted to respectively form portions of first and second combustion chambers and respectively including first and second exhaust ports, a bottom surface extending transversely rearwardly from the cylinder block mounting surface of the cylinder head, a projection extending downwardly from the bottom surface and into the bore, and including an end surface having therein an exhaust gas outlet, and an internal exhaust passage extending between the exhaust ports and the exhaust gas outlet.