Video Guide: 4 Inch Trolling Motor Lower Unit Disassembly & Assembly for Brushed Motors

This video will walk you through the basics of disassembling and assembling a 4" Minn Kota trolling motor lower unit. This video only applies to 4" motors only.

*PLEASE NOTE- If you open the lower unit while under warranty, you will void the warranty. If you need to do any repairs inside the lower unit and you are under warranty, we recommend taking the motor to an Authorized Service Provider.

*PLEASE NOTE- Minn Kota is not responsible for any damage done by attempting repairs yourself. If you are not confident in the repair you are attempting, we recommend taking the motor to an Authorized Service Provider.

Click here to access the Parts Portal to order replacement parts.

Key times in the video:

  • 0:44 Removing the Prop
  • 1:29 Removing the Two Motor thru Bolts
  • 2:34 Replace the Brushes
  • 4:17 Replacing the Prop Shaft Seals
  • 5:29 Belleville Washers
  • 8:45 Reassembly
  • 9:36 Release the Brush Springs
  • 10:45 Install the thru bolt
  • 11:28 install the prop pin

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