1971-02-01

A Modern Outboard Design - Johnson and Evinrude 50 hp 710580

The two-stroke cycle engine has been brought to a high level of refinement in marine outboard motors. This paper describes a recent design with emphasis on the use of exhaust system pressure waves to influence cylinder scavenging and charging. Included is a discussion of how the design was tailored to meet marketing and tooling requirements.

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