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    Hour meter to tach-gctid806972

    Hi

    Anyone ever connected an hour meter to their tachometer? I'm thinking that the theory would be that the hour meter would only run when the engine is actually running then. I have an mercury 90hp outboard, so any suggestions for a better place are welcome.

    Cheers

    Heedrix
    ----------------------------------------------------------------------------------------------------------------------
    Ontario
    2016 170BR
    90 HP

    #2
    "heedrix" post=806972 wrote:
    Hi

    Anyone ever connected an hour meter to their tachometer? I'm thinking that the theory would be that the hour meter would only run when the engine is actually running then. I have an mercury 90hp outboard, so any suggestions for a better place are welcome.
    [color]blue wrote:
    May we assume that the intent is to power the hour meter only when engine operation is detected?

    If so, I am not award of a tachometer that would offer a terminal for this.

    For a 4 cycle engine that builds oil pressure, a N/O oil pressure switch would provide a means of powering the hour meter only upon engine operation.

    However, unless you have a 4 cycle outboard engine, your outboard will not offer that capability!

    If your concern is that your hour meter begins to log run-time when the key switch is turned on (and it's not actually counting true engine run-time), the margin of error from year-to-year is minimal. It is not enough to be worried about. [/color]

    .
    Rick E. Gresham, Oregon
    2850 Bounty Sedan Flybridge model
    Twin 280 HP 5.7's w/ Closed Cooling
    Volvo Penta DuoProp Drives
    Kohler 4 CZ Gen Set

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      #3
      Thanks for your reply. And yes, I'd like to have the hour meter only run when the engine is running. Thanks for the oil pressure suggestion, I'll investigate it!
      ----------------------------------------------------------------------------------------------------------------------
      Ontario
      2016 170BR
      90 HP

      Comment


        #4
        there is one that has a lead that wraps around a plug wire, only logs hours when the engine is running. no personal experience with the unit myself though :whistle:
        Dave
        Edmonds, WA
        "THE FIX"
        '93 2556
        Carbureted 383 Vortec-Bravo II 2.0:1 18 1/4x19 P

        The rebuild of my 2556 https://www.baylinerownersclub.org/f...76?view=thread
        Misc. projects thread
        https://www.baylinerownersclub.org/f...56-gctid789773

        Comment


          #5
          I'm wired into the Oil Pressure switch full - NO side piggy backed to the Electric Fuel pump+ (no fuel - no run - no log), opposed to the Key on triggered till run NC side.. works beautifully. SO when oil pressure hits 5+psi shes logging.

          swapped this https://www.summitracing.com/parts/a...FZGCaQoddpcOiQ for the dummy light version

          Check your threads however theres a couple variations for diff blocks
          2450 Sportcruiser '86
          Repower - Vortec 5.7 '16
          VP275

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