I talked to a salesman at a boat show a few years back about the external units. They look to be of pretty good quality and I havenât heard anything bad about them. Of course you can expect a reduction in sailing performance on the order of half a knot I am told, but I donât think it should be that much based on what I saw. I believe the fellow told me that one had been installed on a 424 and the owner disagreed with the maker of the unit regarding itâs installation. Specifically the angle at which the unit was mounted. He reportedly felt a more âstreamlinedâ arrangement would work better and had an angled shim of some sort installed. The company disagreed but did it anyway. Thatâs all I know. Perhaps the individual who had this unit installed will read this and enlighten us further. I too am intrigued by the idea but that will have to wait, probably indefinitely.
#189, Blue Moon