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>Hello Seamaster “club” >I need some info about prop-size for a Seamaster 813 >We own 2 Seamasters, a 813 and a 30 >The 30 named “Master T” has 2 Leyland thonycroft 2,5 >diesels >TMP gearbox’s, gearratio 2 / 1 >A view years ago i fitted new props to reduce rpm’s >from 3500 to 2600 max >Note: prop-size enlaged from 16 X 12 to 16 X 16, >topspeed from 8 up to 10 knots > >The 813 named Virodi has a Single Wortham Blake / BLMC >Fisherboy 1.5 litre diesel. >Wortham Blake HyDrive gearbox, gearratio 2 / 1 >Curently a 12 X 8 rh prop > >Now we want to fit a new prop under the 813 to reduce >rpm’s from 3300 to about 2600 rpm >Engine running at max 3300 rpm / 7 knots > >What is the standard Prop-size? >What is the recomanded prop-size to reduce engine >prm’s to 2600? > >With best regards >Ronny de Leeuw >Middelburg >The Nederlands

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