Trim gauge malfunction
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Trim gauge malfunction

  1. #1
    Let's hit the water! hawaiian21's Avatar
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    Default Trim gauge malfunction

    Curious if someone could explain how the trim indicator gauge works - mine jumps up to "full up" when I turn the key, and "full down" when the ignition is off. It never changes as I trim the drive in or out.

    That tells me I'm getting juice to the gauge, perhaps the "sender" (for lack of a better term) is broken? Where might I find this device?

    OMC Cobra, 5.8L in a '92 21' Hawaiian.

    Thanks in advance.

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    Senior Member GT Jets's Avatar
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    Quote Originally Posted by hawaiian21 View Post
    Curious if someone could explain how the trim indicator gauge works - mine jumps up to "full up" when I turn the key, and "full down" when the ignition is off. It never changes as I trim the drive in or out.

    That tells me I'm getting juice to the gauge, perhaps the "sender" (for lack of a better term) is broken? Where might I find this device?

    OMC Cobra, 5.8L in a '92 21' Hawaiian.

    Thanks in advance.

    The Cobra's use a similar signal to that of a fuel gauge, disconnect the sensor wire from the gauge (S) and get a jumper wire, with the key on short from ground (G) to the sender (S) and the gauge should full sweep, if no the gauge is FUBAR.

    The sender is a potentiometer and has a carbon strip in it, it is located on the side of the hinge point of the gimball ring and is spring loaded, you can exercise the arm with an ohmmeter hooked to it to see if the meter moves (drive in the up position), more than likely a sensor, quite possibly a shorted wire in the harness somewhere....

    Good luck, I don't know where to find the sensors anymore...But probably available...


    GT
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    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

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    Let's hit the water! hawaiian21's Avatar
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    Thanks for the info, guys! I'll look into this tomorrow (hopefully).

    It's not like I really need the trim gauge, as I just trim it by feel, but I like everything in my vehicles to function properly. (One exception might be the rear door on my Explorer not opening, and hasn't for about 4 years now...)

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    Quote Originally Posted by gtdan01 View Post
    lol i know who did it

  8. #6
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    http://www.sterndrives.com/replacing_trim_senders2.html
    Quote Originally Posted by menadmeyes View Post
    lol i know who did it
    If you know who wrote this out, Then you might want to give them a hard time by telling them they need to up date it a little bit, Because they wrote the hinge pins should be Torqed to 40 lbs. When the real Torqe setting is 95 lbs, With the loctite 27131 to the bell housing threads for the older style R, MR, Alpha one drive, And they should also use the locquic primer "T" on the threads like in the mercruiser service manaul.
    See page 4A-8 in this link.
    http://www.boatfix.com/merc/Servmanl/6/6A4R3.PDF Have fun with it

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