Page 11 of 11 FirstFirst ... 91011
Results 101 to 104 of 104
  1. #101
    Click avatar for tech links/info K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    43,660
    +1
    2,346
    Quote Originally Posted by swan View Post
    I have a 2003 Polaris MSX140 whose speedo doesn't work. All other gauges appear OK and the ski is otherwise in good condition.

    I have performed the test on the paddlewheel as set out on page 7.7 of the MSX140 Service Manual. At rest, my ohm-meter shows an open circuit and when I spin the paddle wheel (by hand and with compressed air) the reading doesn't change.

    I have a spare paddle wheel which was removed from a ski in which the speedo worked just prior to de-commissioning the ski 3 years ago. Bench-testing that paddlewheel yielded the same result as above.

    I wonder whether these units lose their efficacy through non-use. Some paddles on the de-commissioned paddlewheel show signs of retained magnetism; however, I'm not sure how relevant that is to the component's operability.

    ...
    The paddle wheel sensor is a Hall Effect sensor. It is powered by a low current voltage source from the display. As the magnetized paddles pass the sensor the sensor changes resistance, creating a pulse that the dash senses. Pulse counting creates a speed reading.

    The polarity of the test voltage applied to the sensor wires matters. If your ohm meter has opposite polarity at the probes or the voltage is out of range for the sensor then the sensor will not work.

  2. #102
    downunder123
    Join Date
    Dec 2008
    Location
    sydney
    Posts
    191
    +1
    11
    Hi Swan, I have a msx140 speedo that I don't need. I think it works but I have never tested it as I don't have MSX. Yours for aussie $30 if you like.

  3. #103

    Join Date
    Jan 2018
    Location
    South Australia
    Posts
    79
    +1
    2
    Thank you bspanovic, I will PM you.

  4. #104

    Join Date
    Jan 2018
    Location
    South Australia
    Posts
    79
    +1
    2
    Thanks, K447.

    When I tested the de-commissioned paddlewheel in a ski (today), it appeared to work alright. Not sure what I did wrong with my multi-meter test of the paddlewheel alone!


Page 11 of 11 FirstFirst ... 91011

Thread Information

Users Browsing this Thread

There are currently 2 users browsing this thread. (0 members and 2 guests)

Similar Threads

  1. Any recommended GPS units for accurate speed on water?
    By jkernea in forum Polaris Open Discussion
    Replies: 9
    Last Post: 07-13-2015, 12:58 PM
  2. GPS Speedometer for data logging.
    By beerdart in forum 4-Tec Performance
    Replies: 136
    Last Post: 08-31-2014, 10:10 PM
  3. Digital GPS Speedometers
    By way2fast in forum Sea Doo Open Discussion
    Replies: 36
    Last Post: 05-12-2014, 10:31 PM
  4. Replies: 33
    Last Post: 03-31-2014, 11:17 PM
  5. Dash Bezel for SDL Display on SHO
    By SHOBiz in forum Yamaha PWC Performance (4-stroke)
    Replies: 9
    Last Post: 02-25-2010, 06:24 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •