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Thread: 99 slx 1050 mfd

  1. #1
    h2jim's Avatar
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    99 slx 1050 mfd

    Hey Guys. I'm looking for an MFD unit for my sons 99 SLX 1050.


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Where in Ontario are you?
    Would you like me to have a look at the 'bad' MFD?

    Does that SLX have electric nozzle trim?

    Is it the normal speed trim motor, or the fast trim?

    Does it matter to you whether the trim indicator matches the actual trim position?

    Multi-Function Display (MFD)

    Differences between the various MFD versions
    The trim motors on the Pro models, and (some?) SLX, move the trim nozzle at twice the rate of the 'standard' trim motors.
    The MFD on these machines also responds at twice the normal rate, when the trim buttons are pressed.
    If you mis-match the trim motor and MFD, the MFD trim position display will not match the actual trim position..

    3280264 is a fast trim response version, max tachometer 10,000 RPM, matches non-standard fuel sender

    3280252 is a slow trim, max tachometer 7,000RPM, standard fuel sender

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    h2jim's Avatar
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    Hi. I live in Peterborough. I know nothing about this machine. The trim does not work or the MFD. I assumed they were related? When my son bought it the trim did not work or the MFD. Any ideas?

    Thanks

    Jim

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    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by h2jim View Post
    Hi. I live in Peterborough.

    I know nothing about this machine. The trim does not work or the MFD. I assumed they were related?

    When my son bought it the trim did not work or the MFD. Any ideas?

    Thanks

    Jim
    The MFD should work even if the Trim does not. There is a fuse inside the electrical box for the MFD. Only replace it with another 1/4 Amp fuse, no larger.

    There should be zero moisture inside that electrical box, and no corrosion. Signs of moisture or rust are not good.

    Non-functioning trim requires some electrical diagnostics. Often it is the motor or gearbox which has seized with rust.

    The trim motor can be tested in the hull, or on the bench.

    Connect the two unplugged motor wires to 12 volt power. The motor should run, and reversing the battery polarity should make it run the opposite direction.

    If it does not run when directly connected to battery power, then you can take it apart. Sometimes it just needs de-rusting and lubricating.

    Search on the forums for more info from others who have rehabilitated their own trim motors.

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    h2jim's Avatar
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    Thanks. I hope to get at it this weekend. I hope it is as simple as a fuse.

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