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Results 1 to 6 of 6
  1. #1

    Default "I just relocated a pitot tube

    "I just relocated a pitot tube position to provide a aux. motor then the speed meter doesn't work at all.The pitot tube was close to the motor, now it moved to the boat coner. My question is where is the right location and depth of the pitot tube? The speed meter is old mercury air tube style gauge. thanks"

  2. #2
    Join Date
    May 2007
    Location
    Inverary, Ontario, Canada - The Great White North Eh!
    Posts
    8,484

    Default "The pitot tube can be located

    "The pitot tube can be located just about anywhere where it will stay submerged during normal operation.

    As long as the end thingy that collects the water (not exactly the technical term) [img][/img] is in fact in the water when you are running it will still create the pressure needed to feed your gauge.

    Any chance you pinched or punctured the little air line when you moved it - that would cause a malfunction for sure..."
    Graham

    A "professional" is someone who gets paid for their work - it doesn't necessarily mean they are good at it :)

  3. #3
    Join Date
    Apr 2008
    Location
    Johannesburg, Gauteng, South Africa
    Posts
    362

    Default "That would be the pick-up? <[

    "That would be the pick-up?

    As Graham said, make sure the line is not raptured, you could get unwanted water in the tub.

    Does the new motor not have a pick-up in the lower gear case? Some do have, look in the leading edge of the gearcase, in line with the prop&#39;s shaft. Usually a small, &#43;- 3mm hole. If there, a fitting just above would be the connector point for your pitot line.

    I&#39;ve seen that these pitot type guages are not 70% accurate, checked it against a GPS and was out by miles. Nice to have on the boat, but not always true reflection of performance, especially when comparing prop setup and such.

    My worth...

    Happy boating!"

  4. #4
    Join Date
    Feb 2009
    Location
    perth, wa, Australia
    Posts
    956

    Default "The best spot for it is half

    "The best spot for it is half way between the engine and chine... if its too far out at speed it will leave the water and the speedo will stop working,"

  5. #5

    Default "I checked the line, there'

    "I checked the line, there&#39;s no air leaks or damage but I found some water bubbles inside of hose so may be It moved too far out .I&#39;ll moved the pitot tube back to the original position tomorrow and test how it works Thanks everybody."

  6. #6
    Join Date
    Apr 2008
    Location
    Johannesburg, Gauteng, South Africa
    Posts
    362

    Default "Air & water bubbles shoul

    "Air &amp; water bubbles should not pose an issue, it all will compress when pressure comes in from the Pitot pick-up. No cause for concern there.

    Is it working since being moved?"

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