Boatworks

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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Test Calls

by Gordon West, Posted December 14, 2010
Ralph Manies of Seattle, Washington, asks:

"We’ve installed a new ICOM-802 single-sideband radio and now we want to test its DSC (digital selective calling) features. What’s the best way to do this?"

Gordon West replies:

First enter your MMSI number into the unit’s memory and then hook up the second receive antenna to the DSC antenna


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Smoking Windlass

by Gordon West, Posted December 13, 2010
Bob Foster of Sarasota, Florida, asks:

"Last week, while my wife and I were cruising, our windlass motor suddenly stopped when I began to pull up the anchor. At almost the same moment, my wife shouted that she saw smoke coming from underneath the nav station. When we got home our local marine electronics technician told me that some of my electronic gear had been damaged as


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