cooling water sensor problem

Discussion in 'OnBoard Electronics & Controls' started by bertho, Oct 7, 2014.

  1. bertho
    Joined: Aug 2006
    Posts: 181
    Likes: 5, Points: 18, Legacy Rep: 59
    Location: asean archipelago

    bertho bertho

    Gents,
    I have a small problem with a cooling water gauge & sensor..
    when I turn the key on , gauge go to 80 degres , when start the engine
    go down to 0 .. I check again my connection and all look ok..:confused:
    any tips ?
    new sensor, yanmar gauge indicator
    on this engine, a Kubota, this is a solenoid stopfuel, energize to run , can this device be responsible ?

    Bertho
     
  2. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 473, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Remove the wire from the temperature sensor and ground it against the engine block. The temperature gauge should show a full hot reading, with the ignition on. If it does, replace the sending (sensor) unit. If you get less than a full up hot reading it could be the gauge, possibly a gauge (cluster) resistor, a dirty connection (you can't tell anything just by looking at them) or even a chaffed wire. Check continuity along the wire, if good, test it's resistance, if good, the problem is the resistor (if applicable) or gauge.
     
  3. bertho
    Joined: Aug 2006
    Posts: 181
    Likes: 5, Points: 18, Legacy Rep: 59
    Location: asean archipelago

    bertho bertho

    PAR,
    just test your advice.. turn contact on, gauge go to the middle..
    disconnect and ground the wire, nothing move
    start the engine , gauge go to 0
    disconnect the wire , nothing move
    but interesting, connect the wire on the ground , engine stop !!
    (the fuel stop is a BOSCH, with self retaining coil connected to the + from contact
    and energize with the start together with the starter ...
    :confused:
    thanks...
     
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