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  1. #1
    VIP Member Platinum Member wwwTOPDJcom's Avatar
    My Boats:
    1992 450hp Senza Spectre 25'
    Join Date
    Mar 2002
    Vestal/Binghamton NY

    Question depth sounder transducer mounting

    on a stepped hull what is the best way to mount a tranducer?
    external type or internal ? I dont want to have a bunch of holes
    to fill either. I want it right the first time. but I do want to have a reading when underway
    reasonable speeds. which sounders work best?

  2. #2
    Platinum Member Platinum Member Tinkerer's Avatar
    My Boats:
    2001 Daytona 26, 1992 SCARAB 34, 1989 25 Checkmate Convincer, 1977 Glastron Carlson CVX 18
    Join Date
    Jan 2002
    ALTO, MI


    On a stepped hull I have read that the external is the only one that will work with the boat on plane. If you don't care if it works on plane then the tru hull should be fine.
    Hey even if it ain't broke it's still fun to tinker with it.

  3. #3
    My Boats:
    29 Fountain
    Join Date
    Jul 2001
    oshawa ontario
    I  Voted
    We had a pretty good discussion about this in the Fountain owners fourm awhile ago. Its about 4 pages back entitled 'depth finders' It pretty well covers it, step and non step.

  4. #4
    VIP Member VIP Member 26ZX Donzi's Avatar
    My Boats:
    2008 Sunsation 288 MCOB
    Join Date
    Dec 2001
    Itasca, IL
    I have a twin step 26 foot Donzi. The transducer is mounted externally approx. 6-10 inches away from bilge drain, starboard. At higher speeds the gauge still does not read accurately. It is a Gaffrig gauge - not sure who made the rest of the unit. I also heard that readings are much worse with transducer mounted internally on a ventilated hull.

  5. #5
    Platinum Member Platinum Member
    My Boats:
    fuel injection, superchargers
    Join Date
    Jan 2001
    PA and MD
    If your hull is balsa cored it will work poorly, stepped even worse. I'm changing mine to external on the bottom of the extension box. It won't be in the water at speed but lower it will be and be accurate.

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