Reverse-engineering and restoration of a four stroke single cylinder universal fisherman marine engine

Abstract

To understand the inner workings of a 4-stroke engine and all of its components, a complete computer aided design (CAD) model was created of a historic marine engine. The parts were cleaned, measured, modeled in CAD and assembled. To ensure longevity of the rebuilt engine, original parts were repaired and, where necessary, new parts were fabricated. Fixing parts and post machining new castings allowed for machining practice on complex rough castings. The rebuilt engine was tested and successfully ran approximately seventy five years after this engine was first built.