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  1. #1
    Join Date
    Aug 2015
    Posts
    16

    Default Speedo calibration help for '15 Mojo

    Anyone know how to calibrate the speedometer on the '15 mojo? Mine seems to be 2-3 mph off. I saw online and in the manual that there is a knob under the dash, but I looked everywhere behind mine and didn't see anything. Any direction is appreciated.

  2. #2
    Join Date
    May 2015
    Location
    Woodlands/Conroe, TX area
    Posts
    210

    Default

    I have a much older boat ( 2008 ) but typically the potentiometer is under the dash near the key switch. It is not in a bracket of any kind just tie wrapped to the wires.
    2008 Moomba Outback DD resurrection

  3. #3
    Join Date
    Jun 2015
    Location
    North TX
    Posts
    38

    Default

    You should be able to set the offset in the menu options, but I don't remember which ones. My 15 Mojo was off 2 mph and I adjusted using gps app. Was easy.

    Sent from my SM-G900V using Tapatalk
    2015 Mojo

  4. #4
    Join Date
    Aug 2015
    Posts
    16

    Default

    so you use the offset to calibrate it? I wasnt sure what that was for but I saw it in the computer menu. thanks

  5. #5
    Join Date
    Aug 2015
    Location
    Ohio
    Posts
    206

    Default

    Quote Originally Posted by jeamk03 View Post
    You should be able to set the offset in the menu options, but I don't remember which ones. My 15 Mojo was off 2 mph and I adjusted using gps app. Was easy.

    Sent from my SM-G900V using Tapatalk
    I think he is speaking of the speedometer itself and not the digital reading. The speedometer should have a potentiometer under the dash...my 14 Mondo is up and to the far right (if looking from the floor) The offset is to set the digital readout. I am still messing with mine....I had it set perfect so I thought going 20 mph and using a GPS but when surfing, the speed was off again. I don't get it.
    2014 Mondo
    2013 Yamaha AR192.... Long gone

  6. #6
    Join Date
    Aug 2015
    Posts
    16

    Default

    Ok so now I'm a little confused. I want to set the digital speed readout so when I set the cruise for surfing it's at the right speed. I've actually already ordered the GPS replacement unit so I can do away with the paddlewheel surges altogether, but they said the GPS unit and speedometer still need to be calibrated correctly once it's installed. So the offset effects the digital speed readout and the potentiometer effects the analog speedometer gauge? I guess I thought they were connected somehow and not independent of each other.

  7. #7
    Join Date
    May 2015
    Location
    Woodlands/Conroe, TX area
    Posts
    210

    Default

    The analog speedo is controlled by a stepper motor. Depending on the software configuration it can be configured many ways but it will inevitably have to match the speedo's requirements of steps per revolution. Input devices (the paddle wheel) are encoders.
    2008 Moomba Outback DD resurrection

  8. #8
    Join Date
    Aug 2015
    Posts
    16

    Default

    Ok... So can anyone describe the process used to calibrate the paddlewheel speed for the cruise control on the display panel? I'm guessing use a handheld gps and use the paddlewheel offset function. Then if I want the analog speedometer to match I'll find the knob under the dash that controls that. Right?

  9. #9
    Join Date
    May 2015
    Location
    Woodlands/Conroe, TX area
    Posts
    210

    Default

    That is the way I understand it. If you have an iphone, it should tell the speed.
    2008 Moomba Outback DD resurrection

  10. #10
    Join Date
    Feb 2014
    Location
    My Moomba Lives in Eagle River, WI - We Live in Chicago
    Posts
    151

    Default

    Quote Originally Posted by Ruzzbutz View Post
    Ok... So can anyone describe the process used to calibrate the paddlewheel speed for the cruise control on the display panel? I'm guessing use a handheld gps and use the paddlewheel offset function. Then if I want the analog speedometer to match I'll find the knob under the dash that controls that. Right?
    I'm jumping on this thread as I have a similar problem with my 2014 LSV, where I have ~2mph differential between my digital readout and GPS app ...... I assume the process is the same as described above?

    Ruzzbutz - were you able to fix it on your '15 Mojo?
    2014 LSV - Silver Metal Flake & Fire Red
    4,100lbs of upgraded Gravity III ballast (900lbs Lockers, 500lbs Hard Tank, 500lbs IBS and original 650's under each seat), Manual Flow System, Black Chrome Graphics, Oz HD Tower w/ Swivel Lower Board Racks & Fixed Upper Ski Racks, Acme 1235 Prop & I Need More Tower Speakers



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