Also Shaft and Prop
Hi,You will need a long shaft - 20" minimum or the prop will break out in anything but flat water and the prop pitch appropiate for your hull speed (6 kts). There are outboards built just for sail aux. with more gear reduction and room to swing a larger prop. Not essential but more efficient.You might also want to add a fin to the cavation plate of the outboard(see Davis) to prevent prop contact with the rudder - only needed on one side.Have fun!!