Complete DIY Foil Assist Build 6374 6384 eFoil

I have built from scratch a foil assist unit, and I want to share the process with anyone interested. I have provided the written steps for my build, so please don't forget to download the PDF files.

My goal was to build a motorized foil assist unit for under $300 USD, and I did it! See exactly how I did it, what materials I used, how much they cost, where I got them, how I configured it, and how I assembled it. You can use this info as a blueprint for your build. You can modify it as you like, such as use a bigger 6384 motor, or a 65111 inrunner motor. You can use a 12S4P battery configuration for more range, or use a commercially available remote control with this build. You could even integrate the enclosure into your board! Use this information to inspire your build and guide you along the way.

Also, this info can 100% be adapted for eFoil use. For a dedicated eFoil board, I would suggest using the bigger motor, 6384 and a 3 blade propeller, and also use a larger capacity battery, such as a 12S4P with 21700 Li-Ion high-discharge cells.

For clarity, this project involves the complete foil assist propulsion unit. It doesn't include the board or the hydrofoil. Anyways, this foil assist works awesome and I have logged over 20 miles of riding on foil.

For more details, my website is

foilassist.diy

Happy building,
Jerome

*Foil Assist implies boosting into waves for foil surfing. eFoil riding generally implies riding flat water.

**6/29/26 Updated Transmitter code.