Hole in outdrive

06Rinker27006Rinker270 Posts: 1,277 ✭✭✭
in General Boating Discussions
Hello everyone, noticed this hole when prepping outdrive.  What should I use to fill and should I be worried about water intrusion?

thank you in advance.  


Patrick
06 Rinker 270
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Comments

  • J3ffJ3ff Posts: 4,229 ✭✭✭✭✭
    edited April 2019
    pretty sure that's normal on some drives.. 
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  • The Main ExchangeThe Main Exchange Posts: 280 ✭✭✭
    Is that the hole for the speedo?

    2007 300 EC, 350 Mags, B3's, Table Rock Lake, MO

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  • aero3113aero3113 Posts: 9,815 ✭✭✭✭✭
    That’s the water intake for your speedometer, water pressure works the gauge on the dash.
    2008 330EC
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  • zaverin1zaverin1 Posts: 1,672 ✭✭✭
    Lmao!
    yes that’s a speedo pickup hole
    if you had a real hole it be leaking gear lube 
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  • 06Rinker27006Rinker270 Posts: 1,277 ✭✭✭
    I have never seen that before.  Then why do I have a pitot tube? 
    Patrick
    06 Rinker 270
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  • aero3113aero3113 Posts: 9,815 ✭✭✭✭✭
    It’s possible your drive isn’t being used for the speedo and someone installed the pitot. When you get a chance look at your drive and compare to the pic below. This tube is at the top back of the lower unit. Pressure from the hole sends pressure up the tube to the gauge.


    2008 330EC
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  • aero3113aero3113 Posts: 9,815 ✭✭✭✭✭
    edited April 2019
    If the tube is missing or just not connected, water will spray out the hole on top.
    2008 330EC
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  • reneechris14reneechris14 Posts: 3,134 ✭✭✭✭✭
    30psi should be 30mph. Shot it with a little air and the speedo will jump. I have to clean mine out every fall.
    2005 Rinker FV342  Pawcatuck river,Ct
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  • IanIan Posts: 3,062 ✭✭✭✭✭
    edited April 2019
    A twist of a drill bit 1/8 or less in your fingers tends to clear some build up too.

    Regards,

    Ian

    The Third “B”

    Ravena Coeymans Yacht Club

    https://www.rcyachtclub.com/

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  • aero3113aero3113 Posts: 9,815 ✭✭✭✭✭
    What I think he is saying is he has a white pitot tube mounted to the transom that runs his speedo. Cleaning out the hole won’t do anything for him.
    2008 330EC
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  • Dream_InnDream_Inn Posts: 7,936 mod
    Either way, that is hole is definitely normal.  No need, nor should you, do anything to it. :)

    Dream 'Inn III -- 2008 400 Express

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  • zaverin1zaverin1 Posts: 1,672 ✭✭✭
    Or the lower was replaced with newer model but he originally had a transom pickup
    or the reverse situation 
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  • 06Rinker27006Rinker270 Posts: 1,277 ✭✭✭
    I will look today @aero3113!  Guessing if I trim up I can see that?  

    Ha, I was freaking a bit when I saw it.  It must have been so clogged and painted over I never saw it as I sand and paint the drive every spring.  

    Think I can get it reconnected?  Pitot tube does not work great either.  Just replaced it last spring as well.  

    Thanks everyone!
    Patrick
    06 Rinker 270
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  • 06Rinker27006Rinker270 Posts: 1,277 ✭✭✭
    reneechris14 said:
    30psi should be 30mph. Shot it with a little air and the speedo will jump. I have to clean mine out every fall.
    How do you clean yours out?  Just clear the hole or the whole tube?
    Patrick
    06 Rinker 270
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  • aero3113aero3113 Posts: 9,815 ✭✭✭✭✭
    Yes, with the drive up you will see that. Also along with the tube connector shown in the picture above, there is a male end that is installed on the drive side. Both pieces are available online if needed.
    2008 330EC
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  • Glassguy54Glassguy54 Posts: 588 ✭✭✭
    Its supposed to be there. Mine was clogged and I had absolutely zero success trying to unclog, so my speedo never registered.
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  • aero3113aero3113 Posts: 9,815 ✭✭✭✭✭
    @Glassguy54 , check out this quick video. Maybe it could help you out?

    https://youtu.be/QEL4THMZlZA

    2008 330EC
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  • IanIan Posts: 3,062 ✭✭✭✭✭
    As I suggested try a small drill bit, twist gently with your fingers. Have someone watch the speed and blow some air into it.

    Regards,

    Ian

    The Third “B”

    Ravena Coeymans Yacht Club

    https://www.rcyachtclub.com/

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  • 06Rinker27006Rinker270 Posts: 1,277 ✭✭✭
    edited April 2019
    thanks @aero3113 and @icoultha.  I need to investigate to where the pitot tube runs to.  Does it go straight to speedometer or connect with old tube that went to the drive.

    Patrick
    06 Rinker 270
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  • reneechris14reneechris14 Posts: 3,134 ✭✭✭✭✭
    I remove my drives every winter. But it can be cleaned out while on the boat. Raise the drive all the way up remove the tube by moving the tab to the right and wiggle up on the tube. I take a 10 inch piece of wire(actually from and old sending unit) slide it down the hole and spin with my fingers and same in the front hole then shot it with a little compressed air. The tube comes though the transom just above the yoke there is a quick disconnect there. From there is usually a strait shot to  the gauge. I assume this is where they tapped in to yours.
    2005 Rinker FV342  Pawcatuck river,Ct
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  • 06Rinker27006Rinker270 Posts: 1,277 ✭✭✭
    VERY much appreciated.  
    Patrick
    06 Rinker 270
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