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  1. #1
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    Join Date
    Aug 2008
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    Cypress, Texas
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    39

    Speed and trim gauge dont work on 250XS

    Can someone help me. My trim on and speed gauges dont work. Can someone help. The speed odometer worked when I first got it but the trim never has. The boat is a used 08 Z9 with a new O4 250XS Any ideas

  2. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
    Location
    Greenville, SC (US)
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    98,150
    #2

    Re: Speed and trim gauge dont work on 250XS (Kris1222)

    Speedo: Look at the front edge of the gearcase, approximately 2" above the propshaft area. There should be a small hole in the leading edge of the gearcase here. This is your speedo pickup- it's probably crammed full of sand or wood. Some can be "picked clean" with a toothpick... other's need to be very carefully drilled out (especially if it's wood). Determine which situation you have- DO NOT start drilling without talking to a knowledgeable tech FIRST. DO NOT us a POWER DRILL! (I'll be glad to coach you through this if need be).

    TRIM: Take a look at the top end of the tilt ram from the PORT (left) side of the motor. There should be a trim sender over the end of the "pin", which is held on with two capscrews. Look at the harness coming out of it... it will be a "one-wire" (brown with white tracer), or a multi-wire (digital) sender. Follow the wire up into the cowling, and make sure it (or they) are connected.

    Once you've determined which you have (one wire or multi-wire digital), holler back and we'll help you trace your problem down.



    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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