Speedometer question bravo 3

Discussion in 'Sport Boats' started by ygbsm, May 21, 2020 at 2:33 PM.

  1. ygbsm

    ygbsm Member

    78
    Aug 22, 2016
    Knoxville, TN
    2015 230 SLX
    350 Mag/ Bravo III
    350 Mag/Bravo 3. Last season the speedometer quit working; the pitot was clogged with debris. Cleared it out, and now it works- sort of. It is sluggish and lags quite a bit behind actual speed. This happens both accelerating and decelerating. At a steady speed it is about 3 mph off GPS speed. This is definitely a change, it didn't do any of these things before.

    Ideas? Is it still partially clogged? Something else to look at? Thanks!
     
  2. paulswagelock

    paulswagelock Well-Known Member

    Oct 25, 2010
    pa
    2018 SDX 270 OB 300 Verado
    Verado 300
    Yes, still partially clogged. Get a 1/8” drill bit and spin it in there by hand in the drilling direction. It will pull out the debris. Have done this a dozen times over the years.
     
  3. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    And, probably more than a dozen!

    Second thing to check... right above the leading edge of the anti-ventilation plate is a quick disconnect - you disconnect that to at least see if that section is clear. Rarely, does any clog occur further upstream of the pitot hole, though. But the clog may have worked it's way around the first corner inside the drive... or atleast be stuck there at the corner.
     
  4. ygbsm

    ygbsm Member

    78
    Aug 22, 2016
    Knoxville, TN
    2015 230 SLX
    350 Mag/ Bravo III
    Thanks!
     
  5. Leardriver

    Leardriver Active Member

    244
    May 24, 2016
    Denver, CO
    2004 270 Sundeck 8.1 Bravo III
    5.0, 5.7, 6.2 8.1 Bravo III over the years
    You can tilt the drive up and reach behind and disconnect the speed input and give it a blast of compressed air if the easy way of a drill bit or dental pick doesn't work well.
     
  6. Henry Boyd

    Henry Boyd Well-Known Member GOLD Sponsor

    Apr 24, 2007
    Newburyport, on the peaceful and serene Merrimack
    ‘09 Sabre 38 Hardtop Express “Serenity”
    Volvo D6 w/IPS450 Pods
    If you have Smartcraft gauges you could also tie in a gps and switch the speedo to SOG rather than the water pressure. If you don’t have SC, you could swap out the speedo with a gps model from somebody like Faria or Livorsi.
     
  7. ygbsm

    ygbsm Member

    78
    Aug 22, 2016
    Knoxville, TN
    2015 230 SLX
    350 Mag/ Bravo III
    I do have SmartCraft. This problem, and other reasons, have me considering VesselView Mobile. But I've read the Bluetooth connection doesn't work well, and the app has lots of bugs.
     
  8. Henry Boyd

    Henry Boyd Well-Known Member GOLD Sponsor

    Apr 24, 2007
    Newburyport, on the peaceful and serene Merrimack
    ‘09 Sabre 38 Hardtop Express “Serenity”
    Volvo D6 w/IPS450 Pods
    You may be able to very easily wire via NMEA from the gps / mfd to the Smartcraft system. Then you set the data source to gps and it’s done. Specifically it depends on what your hardware is.
     
  9. GypsmJim

    GypsmJim Active Member

    252
    Aug 8, 2018
    Western New York
    '19 SPX 190 OB, 150 & 5 Mercs
    '17 Whaler 150 Montauk
    '15 Yamaha FXHO
    '60 Mulray Dinghy
    '52 Lyman 15'
    Mercury 150 4-stroke
    68 Outboards representing 11 manufacturers
    I never had a need for a smartphone. It just gave my boss the opportunity to call me on Sunday afternoon to come into work to fix a problem.

    When I retired and saw that VesselView Mobile was on sale half price I bought two - one for each of my newest boats.

    To say they are awesome is an understatement. Two units installed on the same phone. The app works awesome. The bluetooth is awesome.

    The first time out I had an unexpected issue - the lower unit picked up a plastic bag. VesselView notified me and a potential motor issue was averted.

    No bugs on mine!!

    Best money i ever spent.
     
  10. ColoSR

    ColoSR Member

    87
    Apr 25, 2018
    2003 Sea Ray Sundeck 220
    MX 6.2L MPI Mercruiser with 2.2 Bravo III drive
    The VV mobile app got a major upgrade last year, it’s far better than the first version. Personally, I haven’t been able to use VVM for speedo because the phone gets too hot in the sun. It does have a lot of great features, a worthwhile investment.

    Faria has gps speedometers for just over $100. they are an easy install all you need is a constant hot and 5 amp fuse.
     

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