Outboard marine propulsion devices and methods of making outboard marine propulsion devices having exhaust runner cooling passages

US9359058B1 · kind B1 · utility

Assignee

• Brunswick Corporation · US

Inventors

• Gregg D. Langenfeld · Fond du Lac, US
• David J. Hilbert · Black Creek, US
• Ryan E. Mueller · Ripon, US

Key dates

• Filing date: Jul 9, 2015
• Grant date: Jun 7, 2016
• Expiry date: Jul 9, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B63H20/28
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An outboard marine propulsion device comprises an internal combustion engine. At least one engine cooling passage conveys cooling water through the internal combustion engine. An exhaust manifold comprises a plurality of exhaust runners and an exhaust log. The plurality of exhaust runners axially conveys exhaust gases from the internal combustion engine to the exhaust log. A cooling jacket on the exhaust manifold comprises an exhaust log cooling jacket that conveys the cooling water along an outer surface of the exhaust log and a plurality of exhaust runner cooling passages that each axially convey the cooling water along an outer surface of a respective one of the plurality of exhaust runners from the exhaust log cooling jacket to the engine cooling passage.