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  1. #1
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    Nosecone speedometer pickup question.

    Would this work? On a Bobs nosecone at the very top of the cone, where it is even with the top of a stock lower the metal is only about a quarter of an inch thick. If you drilled straight down into the cavity where the water is picked up and installed a small tube outlet would that water pressure be overpowering for a speedometer. I am thinking this would work. Any ideas would be appreciated.

    Many thanks, Carter Powell

  2. #2
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    More trubble than it is worth
    a Gps speedo is not expensive
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  4. #3
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    I bet it would work. You could calibrate with restrictors.
    Good idea!

  5. #4
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    A lot of lowers have pickup installed there. It is a big improvement over gps cuz it is around 10 mph faster. Which translates to 100 more hp. And no extra fuel!!

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  7. #5
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    I don't think that would work... the
    cooling system pressure is limited by the poppet valve? Speedo needs it's own inlet.

    Let's just go ahead and make America great again!

  8. #6
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    Pre water pump from the poppet.
    Maybe you just end up with a extra 4" water pressure gauge, kinda?

  9. #7
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    But the impeller just folds in at speed... I'm told.

    Let's just go ahead and make America great again!

  10. #8
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    I have GPS in my other boat but I was just wondering if this would work. I have another boat that I am redoing and it already has a non GPS speedo in it. I was told that the pressure is the same whether it is a small hole or a larger one. Just an idea.

    thanks, Carter

  11. #9
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    Your probably right about restrictors not working, as there is no flow out of sender tube.
    I think you ought to try it, and let me know.
    I have a couple boats, could use this.

    I build flush mount water pickups into the bottom of my model boats with ks brass tube, if your willing to drill a hole in the bottom of your boat, I'll tell you all about it.
    Last edited by OnPad; 06-04-2023 at 10:18 PM.

  12. #10
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    Is there a reason you want to go to these lengths to retain a speedo that's not accurate? Can't you get a replacement speedo in GPS?


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  13. #11
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    This would be my reason. Retaining a vintage matching dash, with stuff already owned.
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    The one boat that I have a working mechanical gauge on is pretty accurate... If you can believe that.

    All that being said, I use my phone or sonar unit for gps speed.

  14. #12
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    I have a transom mounted speedo pickup... just a p.o.s. plastic one that flips up if you run over something.

    They're like $5 and work with any pitot-type speedo, so why fool around making something in the lower unit?

    https://www.greatlakesskipper.com/fa...-pickup-sender

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    Last edited by David - WI; 06-05-2023 at 09:51 AM.

    Let's just go ahead and make America great again!

  15. #13
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  16. #14
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    The reason I wanted to try this is because of all the original gauges. The gauges are autometer and the speedo is already there. I know that GPS is the way to go but I was just wondering if somebody thought this method might work, that's all.

    Thanks, Carter Powell

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