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  1. #1
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    best place to mount SI transducer?

    Ordered a 797 and am wondering hwere the best place to install transducer on this hull. Would prefer to transom mount it so I can get on plane depth readings on 2d.

    sorry for the big pics, but i figured it was better to be too big and detailed, than not enough.

    2013 Alumacraft 1648 MV
    2001 Johnson 35 hp 3 cylinder
    motorguide tour 82
    2 humminbird 797


    1986 fisher marsh hawk 1648
    1994 johnson 50/35 jet

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    #2

    Re: best place to mount SI transducer? (JoshKeller)

    You could mount it where you have the mounted now and not have to drill any more holes. You would have to trim motor up while using SI.

    Or you could mount it under that first step-down.

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    #3

    Re: best place to mount SI transducer? (Flpper)

    I can't tell what's in the transom in front of the motor, but if you have room, right there in front of the motor would give you protection for the 'ducer and it looks like there would be plenty of peripheral clearance for the SI beams.

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    #4

    Re: best place to mount SI transducer? (Flpper)

    If i put it where the transducer is now, will the 4" jackplate put the motor back far enough to get a clean side to side signal? And i believe in your second post, your talking about the speedometer pitot?
    2013 Alumacraft 1648 MV
    2001 Johnson 35 hp 3 cylinder
    motorguide tour 82
    2 humminbird 797


    1986 fisher marsh hawk 1648
    1994 johnson 50/35 jet

  6. Moderator Doug Vahrenberg's Avatar
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    #5

    Re: best place to mount SI transducer? (Flpper)

    Looking at that transom looks like where the old transducer was mounted is your best option. or the other side where another transducer has been mounted...

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    http://www.dougvahrenberg.com/

    BASS Central Open- Competitive Bass Angler and Humminbird Guru
    Visit my website to learn about my sponsor's products, fishing tips and techniques.

    Learn More About Humminbird Side Imaging Visit: http://groups.yahoo.com/group/sideimaginggroup/

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    #6

    Re: best place to mount SI transducer? (Doug Vahrenberg)

    are the SI transducers more prone to breaking off than others? Ive never broken one off this boat, just the jon boat where i go rock hopping in. do they come with a flip up bracket?
    2013 Alumacraft 1648 MV
    2001 Johnson 35 hp 3 cylinder
    motorguide tour 82
    2 humminbird 797


    1986 fisher marsh hawk 1648
    1994 johnson 50/35 jet

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    #7

    Re: best place to mount SI transducer? (JoshKeller)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by JoshKeller &raquo;</td></tr><tr><td class="quote">are the SI transducers more prone to breaking off than others? Ive never broken one off this boat, just the jon boat where i go rock hopping in. do they come with a flip up bracket?</td></tr></table>

    I doubt that they are "more prone" to breaking off, but they are more expensive to replace. A good investment would be a Transducer Shield, regardless of where it's mounted. And don't go "rock hopping" with this one!

    Remember, the SI trans. have to have a clear "line of sight" to both sides, so they may be "hung out" in the danger zone to get that clearance. Get a shield, get a shield, get a shield.

    http://www.transducershieldandsaver.com

    They have shields, brackets, and other accessories you may need or want.

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    #8

    Re: best place to mount SI transducer? (JoshKeller)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by JoshKeller &raquo;</td></tr><tr><td class="quote">If i put it where the transducer is now, will the 4" jackplate put the motor back far enough to get a clean side to side signal? And i believe in your second post, your talking about the speedometer pitot?</td></tr></table>

    You may have to make or buy an extender; I can't tell from the pic.

    Doug V. says there or the other side is best, and he knows what he's talking about.

    Get a shield.

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    #9

    Re: best place to mount SI transducer? (Flpper)

    will that position that yall recomended read the depth at high speed?

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    #10

    Re: best place to mount SI transducer? (JoshKeller)

    [quote=JoshKeller]Ordered a 797 and am wondering hwere the best place to install transducer on this hull. Would prefer to transom mount it so I can get on plane depth readings on 2d. [quote]

    For all intents and purposes, you're gonna need another dual-beam transducer to get your on plane readings. a shoot-thru-the-hull puck mounted in bilge is the typical set up.

    Reason; the SI transducer can't handle the amount of information gathered or the turbulence created while at high speed. It is designed for "stalking" fish and identifying potentially productive structure at slow (&lt;3mph) speeds. The shoot-thru transducer is out of the turbulence will give you sonar (depth readings) while running on plane.

    Also, as Wayne P. sugested to another poster; if this is gonna be a single unit, buy an extra quick-disconnect mount, TM transducer and power cord to mount up front. That way, you won't have to turn the console base around and squint to see the display. ( The Screen is only ~ 5" diagonal)

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    #11

    Re: best place to mount SI transducer? (Flpper)

    [quote=Flpper][quote=JoshKeller]Ordered a 797 and am wondering hwere the best place to install transducer on this hull. Would prefer to transom mount it so I can get on plane depth readings on 2d. <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote &raquo;</td></tr><tr><td class="quote">

    For all intents and purposes, you're gonna need another dual-beam transducer to get your on plane readings. a shoot-thru-the-hull puck mounted in bilge is the typical set up.

    Reason; the SI transducer can't handle the amount of information gathered or the turbulence created while at high speed. It is designed for "stalking" fish and identifying potentially productive structure at slow (&lt;3mph) speeds. The shoot-thru transducer is out of the turbulence will give you sonar (depth readings) while running on plane.

    Also, as Wayne P. sugested to another poster; if this is gonna be a single unit, buy an extra quick-disconnect mount, TM transducer and power cord to mount up front. That way, you won't have to turn the console base around and squint to see the display. ( The Screen is only ~ 5" diagonal)
    </td></tr></table>


    I have DI on the front and will just be using the SI on the console. Is there a way to turn off the SI when running so it will act like a regular 2d system?
    2013 Alumacraft 1648 MV
    2001 Johnson 35 hp 3 cylinder
    motorguide tour 82
    2 humminbird 797


    1986 fisher marsh hawk 1648
    1994 johnson 50/35 jet

  13. Member Wayne P.'s Avatar
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    #12

    Re: best place to mount SI transducer? (JoshKeller)

    IF you use a shoot-thru for the 83/200 kHz and the AS SIDB Y cable with the transom mounted SI transducer, both will be active all the time.

    If you want to only use the shoot-thru and not the SI transducer some of the time, you have to use the TS3 switch to choose which transducer to use. When you go that route, you need to change the Transducer Select in the unit menu to which transducer you have selected.

    The Sonar Off setting turns off all frequencies.

    Wayne Purdum
    Charlottesville, Va.
    798ci SI, 1198c SI, 1198cSI, bow 360
    6.300, 6.490, 7.090---------2.030

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    #13

    Re: best place to mount SI transducer? (Wayne P.)

    i know on my DI unit, i can pan through the windows to get JUST 2d sonar. Even if the SI beam is still going, when Im on plane, will it work with the SI transducer to get depth in 2d sonar?
    2013 Alumacraft 1648 MV
    2001 Johnson 35 hp 3 cylinder
    motorguide tour 82
    2 humminbird 797


    1986 fisher marsh hawk 1648
    1994 johnson 50/35 jet

  15. Member Wayne P.'s Avatar
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    #14

    Re: best place to mount SI transducer? (JoshKeller)

    Yes, if you have the SI transducer mounted so it will give you on-plane performance.
    If you use the dual transducer setup with the SI transducer on the transom and a shoot -thru, it will still give you on-plane depth performance if installed correctly.

    It makes no difference what view you have displayed, all the frequencies are active all the time. That is why when you change views, the complete screen shows the history of that frequency.

    Spend some time with your unit to see what it does.

    Wayne Purdum
    Charlottesville, Va.
    798ci SI, 1198c SI, 1198cSI, bow 360
    6.300, 6.490, 7.090---------2.030

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    #15

    Re: best place to mount SI transducer? (Wayne P.)

    sounds good, i just need the on plane 2d readings for the few times ill use the big motor until I can get the 2nd transducer
    2013 Alumacraft 1648 MV
    2001 Johnson 35 hp 3 cylinder
    motorguide tour 82
    2 humminbird 797


    1986 fisher marsh hawk 1648
    1994 johnson 50/35 jet

  17. Moderator Doug Vahrenberg's Avatar
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    #16

    Re: best place to mount SI transducer? (wiggleworm)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by wiggleworm &raquo;</td></tr><tr><td class="quote">will that position that yall recomended read the depth at high speed?</td></tr></table>

    Probably won't I think it will be too high but it might no way to tell 100% unless you test it.

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    http://www.dougvahrenberg.com/

    BASS Central Open- Competitive Bass Angler and Humminbird Guru
    Visit my website to learn about my sponsor's products, fishing tips and techniques.

    Learn More About Humminbird Side Imaging Visit: http://groups.yahoo.com/group/sideimaginggroup/

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    #17

    Re: best place to mount SI transducer? (Doug Vahrenberg)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by Doug Vahrenberg &raquo;</td></tr><tr><td class="quote">

    Probably won't I think it will be too high but it might no way to tell 100% unless you test it.

    </td></tr></table>

    does it read 2d any different than another 2d transducer? If I get on plane readings where the current transducer is, shouldnt the si work at the same location?
    2013 Alumacraft 1648 MV
    2001 Johnson 35 hp 3 cylinder
    motorguide tour 82
    2 humminbird 797


    1986 fisher marsh hawk 1648
    1994 johnson 50/35 jet

  19. Member Wayne P.'s Avatar
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    #18

    Re: best place to mount SI transducer? (JoshKeller)

    Yes, it "reads" the same as any 2D transducer for the 83/200 kHz. But the Humminbird SI transducer is not as hydrodynamic as the Lowrance torpedo transducer. Only testing will let you know the performance.

    If you don't want the big rooster tail, you need the rubber plug in the mount.


    Wayne Purdum
    Charlottesville, Va.
    798ci SI, 1198c SI, 1198cSI, bow 360
    6.300, 6.490, 7.090---------2.030

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    #19

    Re: best place to mount SI transducer? (Wayne P.)

    looks about the size of the huge garmin transducers that throw water up 10' above the boat
    2013 Alumacraft 1648 MV
    2001 Johnson 35 hp 3 cylinder
    motorguide tour 82
    2 humminbird 797


    1986 fisher marsh hawk 1648
    1994 johnson 50/35 jet

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