20 Most Recent MotorGuide STANDARD MOTOR REPLACEMENT PARTS SWITCHES AND COMPONENTSDescript Questions & Answers

This is most often caused by a faulty 24 Volt, section, (usually damaged output semiconductors, or the drive?) in the speed controller, fault, the only "Fix" is replacement. Simply obtain the entire speed controller and replace it "En Bloc" as it were. You will need to also obtain a service manual so you can disassemble it and obtain the parts numbers for the replacement parts.Otherwise take it to a professional and ask for a "Quote" as to prospective costings and go from there.

put the motor in the water and ensure that the propeller is at the rear. On the head of the unit (where the direction indicator is) push down and turn the round plastic plate (this plate has the direction indicator on it) clockwise until the direction indicator mark (mine is blue and is about one inch long) is in line with the alignment bar on the non-moveable part on the head. You will hear several "clicks" and this means that the indicator plate is clicking around to the proper directional alignment with the motor in the water.

Trolling motor runs on it's own when plugged in,speed adjuster won't control speed and 3 position switch doesn't perform either..please help. motorguide 74lb thrust.

It very likely has a power transistor to vary the current to the motor. I am guessing that transistor has a collector to emitter short. That can be verified with a common ohm meter on a low ohms scale.

Well if it goes in reverse, to me that would suggest that the batteries are wired in reverse? Either that or the controller has gone faulty?

I believe you may have a bad low voltage circuit board problem. I do not think they make the board any longer but you may be able to convert it to work by bypassing the circuit board. I am working on one now.

You have a high resistance short either inside the wiring or the lower unit. This will cause a voltage drop. I would be very careful not to keep it connected too long cuz the battery is trying to keep up with the current demand and may explode.

check the power switch for voltage,, short it across the pins and see if the motor runs, if it does, replace the switch