Minn kota riptide 55 bow mount with foot control and auto pilot. problem is prop doesn't seem to spin as fast so top speed is about half to two thirds of what it was when new. unit is about 5yrs old.just got a new deep cycle battery {120 amp hour}.battery is running nothing but the electric.on the foot controls ,if i put it on the 1st and 2nd speed prop doesn't turn at all. thanks for your help.

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This is a link that will allow you to look at a schematic for you motor.
Minn Kota hand control motors have a small nut/bolt thru the motor shift aligning the handle with the lower unit. If yours does not line up your either missino this bolt or a previous owner altered the motor.
Hope this helps.

I have a terrova with i pilot same thing happened found out it was the remote, if thats not it then you will more than likely have to send it in for repair.

is the prop shaft bent you may have busted a magnet in the motor dragging now

Use a gear puller.

The prop slides off with a shear pin behind it. Regards Phil

Does the unit work without the auto pilot? Sounds like the auto pilot or the reciever is not functioning correctly.
Check and make sure the unit is grounded properly, you may need to run a test ground wire from the battery to the motor istelf to check this.
This is simple to do and takes 15 minutes. Starting in the battery compartment feed cable into the split-loom and continue feeding until reaching the control panel. Pull an extra 5 foot of cable and open dry hatch in rear by motor feed cable around and out to motor connections., Good time to check any circuit breakers
Try cycling the auto pilot though the modes.
there are 3 modes
to cycle through each mode
hold down the + and - key for 2 seconds
this cycles you to the next mode. Last but not least, try turning the unit on and spinning the prop by hand to see if it takes off, the motor migt be bound up slightly or have a bad spot on the brushes.

your magneto is shorting [ arcing on high needs, openup and replace magneto. call minkota and order a new magneto for your model, unless under warrantee.

Hi!
To start with, here's a schematic:
RT55 Hand Control
Sounds like key# 87 broke....seen it before.
To replace it, remove top cover, then remove the handle portion by removing the 5 screws underneath. There are a few peices in there, so keep close watch. Also be careful of the fine ribbon wire attaching the handle to the control board...it's pretty fragile.
Best of luck!
Mike

There is a good chance that the control board is bad. This is a common problem with these units. I have replaced my control board twice. When the control board goes out, some function of the unit will not work correctly while other functions work fine. The first time mine went out, the prop motor would not work. The last time the board went out, the unit would only steer right.