Question about MotorGuide STANDARD MOTOR REPLACEMENT PARTS SWITCHES AND COMPONENTSDescript

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Wire going to prop of Motorguide trolling motor shorted

Bow Mounted, 12 Volt, 5 speed, 46 lb thrust, (fw46fb) foot control, Motorguide trolling motor. Wire shoted going down shaft to foot, speed 1-4 no longer work but speed 5 does work. How do i FIX IT.

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Unless you are mechanically inclined, dont attempt this. Take the lower unit apart by removing the prop and removing the two bolts that hold the forward and aft housing to the center housing. Fwd being the cone shaped part. Pull the aft housing away from the motor so you can inspect the connections to the board that holds the brushes and the soldered wiring terminals. You should find the solder missing from at least one of the terminals that connects the wiring from the foot switch to the speed control windings inside the aft housing. Clean up the terminal and wiring and re-solder. Also re-flow the solder on the other terminals. Clean up the seals and the area where the seals meet the housing parts. Replace seals if damaged. Reassemble the lower unit and torque the bolts 45-50 in-lbs and no more otherwise you will fail the seals. This problem is due to a "cold" solder joint that creates a high resistance to elec current flow and heats enough to melt the solder. This is a result of poor quality control at the manufacturer. Good luck.

Posted on Dec 29, 2011

  • Earnie Olin
    Earnie Olin Mar 25, 2013

    Kudos to Master Mechanic. This is the right answer. Not easy, but doable. Don't waste your money on a speed switch.

  • Earnie Olin
    Earnie Olin Mar 26, 2013

    Master Machinist*

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