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  1. #1
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    Adapting CanDooPro digital GPS speedometer for NGI display on Polaris MSX hulls

    What is the difference between models? Are they all electrically the same just with different plugs for different applications? Reason I ask is I have 2 Polaris skis with the paddle wheel speedo pickup and Im looking for a GPS unit to replace the paddle wheel sensor with.
    Last edited by K447; 03-31-2014 at 10:16 AM.


  2. #2
    They are not all the same electrically, there are two major different types of systems out there. On the Sea Doo and Yama Cruiser models, the paddle wheel is powered by the line that also does the sensing. On the Yama non-Cruiser and all Kawi models, the paddle wheel has its own power, and simply switches the signal with the paddle. Other than that, it is mostly different connectors. Our calibration scheme is totally flexible for the pulses.

    On your two Polaris skis, which years and models are you looking for? I can take a look at their systems to see if our system will be compatible.

  3. #3
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    2003 and 2004 MSX. Those were the only models Polaris made that used the paddle wheel

  4. #4
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    If it will work for the Polaris, which I am sure a version you have will, I will be buying 2 units for sure.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by CANDooPro View Post
    They are not all the same electrically, there are two major different types of systems out there. On the Sea Doo and Yama Cruiser models, the paddle wheel is powered by the line that also does the sensing. On the Yama non-Cruiser and all Kawi models, the paddle wheel has its own power, and simply switches the signal with the paddle. Other than that, it is mostly different connectors. Our calibration scheme is totally flexible for the pulses.

    On your two Polaris skis, which years and models are you looking for? I can take a look at their systems to see if our system will be compatible.
    Apparently the Polaris NGI display system only shows up to 75mph (or some other not so big number).

    One possible work around for the fast modified Polaris machines is to set the NGI display to function in metric kilometers, but feed it pulse data such that the number showing is actually the mph. So a display reading of '80kph' would be a real world 80mph, for example. In this manner speeds of over 100 real mph would display correctly.

    This gets around the limitation of the Polaris NGI display, but requires the pulse rate from the GPS module to output at 62% (roughly) of the 'real mph' pulse rate.

    Perhaps this is already possible via the flexible calibration scheme?

  6. #6
    Yes, this is a good way to get around the limitation of the speedo maxxing out at 75. This trick will also work with the Sea Doo clusters that max out at 70 MPH. The Candoopro GPS module can calibrate to any offset. You would simply switch to KPH mode on the cluster, enter calibration mode on the module, the unit will start out putting out pulses that will read around 80 KPH, then you would simply calibrate down to 50 KPH. The cluster will display accurate speed from that point forward, keeping in mind that KPH is really MPH.

  7. #7
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    Keith we need to know the electrical characteristics of the polaris paddle wheel sensor so we can figure out which CanDoo model to get. Im sure it would involve changing plugs on the GPS unit to make it plug and play with a Polaris. The MSX display maxes out at 75MPH. I have tested it with an air hose on the paddle wheel.

  8. #8
    Moderator beerdart's Avatar
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    MSX Dia.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	MsxSpeedo.jpg 
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  9. #9
    Looks to be a self-powered sensor design, similar to the Sea Doo paddle assemblies. Are there any testing instructions in the service manual? For a self-powered unit, the voltage on the Purple/Yellow wire should vary from vehicle voltage (12VDC) to 5-8VDC as you turn the paddle slowly.

  10. #10
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    Click image for larger version. 

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