New hour meter not counting hours?!

usaski1usaski1 Posts: 684 Crazy Baller
Swapped ECM for ZO, also added new tach/hour meter gauge. (Oem) The gauge reads 0.0 hours after first ski set sense changed meter. Is the ECM not communicating with the guage? Are the hours stored in the ECM, or the gauge?
Mark Turner -- Water skiing changed my life forever.


  • fox197fox197 Posts: 105 Baller
    Hours should be stored in the gauge brother. At least you boat will never get any older hour wise
  • KelvinKelvin Posts: 1,024 Crazy Baller
    The ECM also tracks hours.
    Kelvin Kelm, Lakes of Katy, Katy Texas
  • usaski1usaski1 Posts: 684 Crazy Baller
    Why would the new gauge not show any hours? I half expected it to show xxx.x hours when I plugged it in. It's a digital readout. More puzzling than that, why would it not be counting new time? 0.0 hours after at least 1/2 hour of runtime...
    Mark Turner -- Water skiing changed my life forever.
  • BraceMakerBraceMaker Posts: 2,479 Mega Baller
    What is the OEM gauge? I know you did an ECM conversion but we can look up the wiring for the gauge and help troubleshoot.

    Gauge may be relying on something you eliminated in the conversion.
  • usaski1usaski1 Posts: 684 Crazy Baller
    It's a Moomba OEM tachometer / hourmeter.. same plug, direct swap. I replaced it because the hour meter was blank. Has been for years. Got a new tach just to get the working hour meter... so far, just is lit up, and shows 0 hours.
    Mark Turner -- Water skiing changed my life forever.
  • UWSkierUWSkier Posts: 754 Crazy Baller
    Gauge should be counting hours run, but it stores the hours. We had to replace the tach in our '01 Malibu after a few seasons. Hours there started over from zero.
  • JmoskiJmoski Posts: 204 Baller
    edited April 16
    Couple thoughts - I agree with @bracemaker that you might need an extra cable or adapter to make it work with the OEM gauge.

    I replaced my tach/hourmeter on my old nautique (the dreaded teleflex gauges) and I hooked the new meter up to a car battery to wind the hours on so it read the actual engine hours once I plugged it in.

    My old nautique had the Ford GT40 block - awesome engine but it does not track hours, so if you ever buy a early 2000’s vintage boat with the GT40 you have trust the guy selling it to you is being honest about the hours as none with have the original gauge.

    I bet your ZO gauge displays the hours coming from the engine - so atleast you know where your at for performing maintenance. My Stargazer PP has it, just not obvious how to navigate to it.
  • BraceMakerBraceMaker Posts: 2,479 Mega Baller
    @Jmoski The PP one you set the hours when you fire up the boat, which is nice if you have it and are having the computer scanned as you can punch it in then and eliminate the factory Tach/Hour instrument for PP.

    @usaski1 - what year/model is the boat?

    My guess, and I'll have to verify this off a moomba wiring diagram.
    Hour meters on some boats work with the key on, that being they'd count over hours so long as the key was on - this was a problem when people wouldn't turn the key to aux or didn't turn it fully off.
    To avoid this some meters will use a "running only" wiring, usually this means the gauge is provided switched power(often purple), tach feed signal(often grey), ground(often green/brown), and some 4th signal source such as oil pressure(yellow beige or....)
    If that one isn't wired you'd still get lights and tach function. But hours wouldn't tick.

    My experience has been that unless you have a digital display that includes an hour meter as one of its functions that the gauge is usually not communicating with the computer of the engine to coordinate its hours and that it is just a clock.
  • BraceMakerBraceMaker Posts: 2,479 Mega Baller
    Should add to this, it may not have a separate source and feed just off the tach - in which case if the tach works and the hours don't I'd suspect a bad gauge.
  • DragoDrago Posts: 1,040 Crazy Baller
    @usaski1 ^^ did you say your old hr meter wasn't working either ?
    Sr sl driver & judge
  • usaski1usaski1 Posts: 684 Crazy Baller
    Old hour meter was not working either... but it was just blanked out. it stopped a few years back.. assumed the screen just failed. when it stopped, the boat had about 350 hours... no clue now... boat is 08 Moomba Outback.
    Mark Turner -- Water skiing changed my life forever.
  • DragoDrago Posts: 1,040 Crazy Baller
    Ah, maybe its input, not the actual meter.
    Sr sl driver & judge
  • Moved2skiMoved2ski Posts: 11 Baller
    I had a meter stop on a 2000 merc . I ended up paying a dealer $100 to scan it and print out a report so I could sell it.
  • BraceMakerBraceMaker Posts: 2,479 Mega Baller
    edited April 18
    @usaski1 check your voltage when running. I think it's low I did some research and the moomba gauge seems to be a beede. It should display a hourglass type logo to the left of the gauge when running.

    This is a running only type gauge and appears to use voltage to determine if the engine is running.

    I'd expect that it would count time if you turn ignition on while connected to a charger.
    Check for any cause of low charge voltage condition. Battery should read 12 and a but when off and 14ish when running.

    Hope this does it.

  • usaski1usaski1 Posts: 684 Crazy Baller
    still no dice... hooked up the charger to the battery, turned on, no indication it was counting time as no hour glass (dealer said today I should see an hourglass). Started boat with charger connected.. still nada...
    Mark Turner -- Water skiing changed my life forever.
  • Mateo_VargasMateo_Vargas Posts: 782 ★★★Triple Panda Award Recipient ★★★
    If you are frozen in time why fix it?
    Success is failure that just hasn't happened yet
  • BraceMakerBraceMaker Posts: 2,479 Mega Baller
    Sorry bout that, I'm out of ideas!

    Maybe just a bad oem gauge.
  • gregygregy Posts: 2,424 Mega Baller
    Does it say on the gauge what company makes the gauge. If so I would contact them and see what activates the counting. May just be a setup issue. Is the tach showing RPMs correctly?
  • usaski1usaski1 Posts: 684 Crazy Baller
    tach is showing RPMs correct... I'll look for the mnfr...
    Mark Turner -- Water skiing changed my life forever.
Sign In or Register to comment.