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Go Back   SailNet Community > On Board > Gear & Maintenance > Electronics
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  #1  
Old 05-22-2010
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Question Change Airmar transducer

New to me boat has old Airmar (Navico) transducers (Depth and Speed). I am replacing both as well as the wind with a Raymarine ST60+ suite. (Depth, Speed, Wind)
The problem is in getting out the old Airmar tranducers. I have removed the retractable plugs but am left with the sleeves. Sleeves and lock nuts are heavily compounded - have pretty well cleaned up one, but it is too well sealed to move.

Options appear to be to drill out the sleeves from the bottom with 2 " keyhole saw. Problem would be to keep it centered. The opening for the new transducers should be the same size.
Cutting down the sleeve with a Dremel type cutting disc, then using a 2 1/2 " socket on the lock nut. Very little room to lever socket handle.
Cutting down the sleeve with a Dremel type cutting disc, then cutting the sleeve with a hacksaw (ala removing a cutlass bearing) and then hammering out sections.

I would appreciated hearing options 4,5, 6 ......
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Old 05-22-2010
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If the old depth is 200 KHz it can most likely be re-used with the ST-60 with soem creative wire stripping and terminating of the old coax that was likely used. My ST-60 depth has been running off a 30 year old 200 KHz Radarsonics t-ducer for the last three years.

Before ripping out the old thru-hulls call Gemeco and see if they have an Airmar speed t-ducer that will fit that old plug but that will also work with the ST-60. Gemeco is Airmars wholesale/retail end and Raymarine, and just about everyone else for that matter, use Airmar t-ducers..

Gemeco
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