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Outboard marine propulsion devices and methods of making outboard marine propulsion devices having exhaust runner cooling passages
Outboard marine propulsion devices and methods of making outboard marine propulsion devices having exhaust runner cooling passages
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机译:舷外船用推进装置及具有排气流道冷却通道的舷外船用推进装置的制造方法
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摘要
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.
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