Boatworks

Mystery of the Alternator

by Nigel Calder, Posted January 25, 2011
Frank Hague of Jersey City, New Jersey, asks:

"I repowered my boat last year with a new Westerbeke engine that came with a 100-amp alternator with an external regulator. I also have a solar array and an Air Breeze wind turbine feeding juice to my house batteries. When the house batteries are full and I am feeding them power from the alternator, my tach needle will suddenly


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Friend or Faux?

by Adam Cort, Posted January 10, 2011
One of the most eye-catching boats at the Newport boat show last fall, the Scandinavian Cruiser 20, is a fast daysailer with a narrow hull and a traditional teak deck. At least it looked like teak. As I was checking out the SC20, something about those decks struck me as being a little off. Then it hit me: they looked too good, too clean to be real. The fact that I had to ask to make sure they
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Ground Round

by Don Casey, Posted December 14, 2010
Lee Andrews of East Hampton, New York, asks:

"I’ve had electrolysis issues on my Tartan 3800, so I’ve installed a galvanic isolator, I deploy a zinc grouper whenever I’m in a slip, and I use shore power only when I have to. When I hauled out last fall I could see my shaft zincs were far less corroded than in previous years, but paint continues to pop off my lead keel in


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Asymmetrical Drag

by Win Fowler, Posted December 14, 2010

Hal Garner of Fort Myers, Florida, asks:

 

"My mast doesn’t have sheaves for a spinnaker halyard, so I fly my asymmetric spinnaker on my second genoa halyard. I also bend the sail’s tack onto a line that runs down through a block directly behind the forestay to a winch in the cockpit. When tacking the boat, I handle the spinnaker the same way I would a genoa. However I’ve


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Propeller Puzzles

by Nigel Calder, Posted December 14, 2010
Steve Hiss of North Kingston, Rhode Island, asks:

"I’ve installed a rebuilt M3-20 Universal diesel on my 29-foot Ericson, and I’m wondering whether the new three-blade prop, which looks a bit too big, is correctly sized. When I put the engine in gear just above idle speed the boat moves forward quietly, but any increase in rpm produces a pulsing vibration under the back of


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