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Propeller size for R38?

To fit Perkins M50/Hurth gearbox
Posted: 6 Sep 2011 - By: David Watts
Henry Morgan (ex Galatea of Avon) is a 1978 Rival 38 and was fitted with a Mercedes 35 hp diesel engine, together with presumably a 2:1 reduction reversing gearbox. 1993 when a Perkins M50 with Hurth reversing gearbox and reduction gear was fitted. 18 ins dia. x 12 ins pitch was not changed out to provide a propeller better suited to the circa. 38% increase in shaft hp.

As the boat is in the water and prop not accessible for inspection and measurement, I would be grateful if someone could provide details of the standard propeller fitted to a 38C with a 35 hp engine. 50. 45.

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