Ask Sail: Transducer Extraction - Sail Magazine

Ask Sail: Transducer Extraction

I have to replace my depthsounder. The plastic nut that holds the old transducer in place was set in the hull with adhesive. The new transducer will not fit the old nut, which has proven very difficult to remove.
Author:
Publish date:

Weldon Nelson of Winchester, Massachusetts asks:

I have to replace my depthsounder. The plastic nut that holds the old transducer in place was set in the hull with adhesive. The new transducer will not fit the old nut, which has proven very difficult to remove. I am sure that others have had this problem. Your suggestions on how to remove the old transducer holder would be appreciated.

Don Casey replies:

DonCasey

You must remove the plastic nut. You should be able to split it with a hammer and a wood chisel. Once it is split, you may be able to break it loose with a wrench, or you may have to pry it loose in pieces, wedging it free from the hull with the chisel.

With the nut removed, you can extract the transducer housing as you would any through-hull fitting. A solid whack from inside with a small sledgehammer may break it free and drive it out of the hole in the hull. Otherwise, you can pull it out with a threaded rod or long bolt. Pass the rod through a short length of strong wood bridged across the through-hull hole and supported on each end with wood blocks set against the outside of the hull. Inside, the rod passes up through the center of the transducer housing, then through a steel plate or a piece of hardwood set on the inside end of the housing. Fit both ends of the threaded rod with washers and nuts. Hold one nut stationary and tighten the other one, and the housing will pull out of the hull.

Clean away all the old sealant before starting your new installation. You probably don’t need me to remind you that the sealant should be applied around the flange on the outside of the hull only, never inside the hull, and never to the retaining nut. 

Related

Thoreau

A Thoreau Approach to Sailing

I know someone who spent two years, two months and two days staring at the water, living in a space 150ft square, and paying keen attention to the weather. This sounds like a happy circumnavigation, and in a sense, it was, because the person I’m referring to is Henry David ...read more

shutterstock_1886572

Cruising: Won Over by Lake Michigan

Like many, I often spend my sailing holidays far away from home, assuming that real adventure requires some kind of international flight. More and more, though, I’m learning that some of the best sailing vacations can be found right in my own backyard.In this spirit, I skipped my ...read more

00WindGenerator700x

How-to: Installing a Wind Generator

Solar panels or wind generator? There’s little doubt that for Stateside cruising, especially down South where the amount of sunshine outstrips the strength of the wind for much of the year, solar is top of the list for liveaboard and long-term cruisers. Having seen what even a ...read more

01-Ursus-Maritimus-31081

The Figawi Race: A New England Classic

When I was 15, some of my sailing classmates kicked off the summer by sailing the Figawi, New England’s legendary season-opening race held every Memorial Day weekend. A winding course between Hyannis and Nantucket, it was a seemingly epic voyage to a bunch of kids who had never ...read more

03-Panama-Posse-honduras

Panama Posse Enters Its Second Year

The Panama Posse is back this month after a successful inaugural rally in 2017-2018. This year it includes visits to seven Central American countries—Mexico, Guatemala, El Salvador, Nicaragua, Honduras, Costa Rica and Panama.Over the course of the rally, organizers provide ...read more

TOTW_PromoSite

SAIL's Tip of the Week

Presented by Vetus-Maxwell.Got a tip? Send it to sailmail@sailmagazine.comLetting go the sheetTaking a loaded-up sheet off a winch when the boat tacks can be a just cause for nervousness. On a boat up to 40ft or so, the safest way is to first ease off a few inches, keeping the ...read more

USCGReadyForRescue_Identifier_FullColor

USCG Ready for Rescue Challenge

The U.S. Coast Guard is now collaborating with the U.S. Department of Homeland Security (DHS) on something it calls the “Ready for Rescue,” a $255,000 prize competition that is looking for ways that will make it easier to locate people, MOB victims in particular, in the water.The ...read more

04-CLR1718md1085-jpg

A Historic Win for Wendy Tuck

This past summer Australian sailor, Wendy Tuck (inset), became the first woman to win a round-the-world yacht race when she and her crew aboard Sanya Serenity Coast claimed the overall victory in the 2017-18 Clipper Race. “I am just so happy,” Tuck said at the finish in ...read more