How to Remove a Boat Propeller: A Step-by-Step Guide

Removing a boat propeller might seem like a daunting task, but with the right tools and guidance, it's a process that can be done quickly and efficiently. In this blog post, we'll walk you through the steps of removing a boat propeller, based on the insights shared by Tyler from BoardCo in this video, "How To Remove a Prop."

Tools You'll Need

Before you start, make sure you have the following tools on hand:
  • Pliers: To remove the cotter pin.
  • Sockets: Different sizes may be needed.
  • Impact gun or handheld ratchet: To remove the prop nut.
  • Extension: To reach the prop nut.
  • New cotter pin and prop nut: To replace the old ones.
  • Prop puller: There are standard prop pullers and harmonic prop pullers available.

  • Removing the Prop Nut

    The first step in removing a boat propeller is to take off the prop nut. You can do this using a handheld ratchet or an impact gun. If you're using a ratchet, make sure one person is holding the prop while another person is using the ratchet. If you're using an impact gun, you'll also need an extension and a socket.

    Removing the Prop

    There are a couple of methods you can use to remove the prop.

  • Standard Prop Puller: This tool sandwiches itself between the prop blades and the strut in the back. You then use a socket to turn it, which will gradually work the prop off.
  • Harmonic Prop Puller: This tool screws onto the end of the strut. You then strike it with a sledgehammer or a normal hammer, and the vibration from the strike will start to move the prop off.
  • Once the prop is free, be careful when removing it as there is a small keyway that you don't want to lose.

    Installing the New Prop

    When installing the new prop, you'll need to align the keyway on the prop with the keyway on the shaft. Once aligned, slide the prop on.

    Next, take the new prop nut and get it started on the shaft. Use your tool of choice to tighten it securely.

    The final step is to insert the new cotter pin.


    Removing a boat propeller is a straightforward process once you know the steps and have the right tools. Remember, when looking for a prop puller, make sure you know the shaft diameter on your boat to get the right one.

    If you have any further questions or need assistance with boat servicing, or if you're looking to get a new prop or even a new boat, don't hesitate to reach out to the experts at BoardCo. They're ready to help you with all your boating needs.