Mechanical Throttler for Jet Drive

I’ve wired up a 75mm jet drive to a flier 300amp ESC controlled 8000W BLDC. The goal is to build a boat around the propulsion system. This project is to power a dingy from the dock to the bigger boat. I’d like to have a stick throttle, like you see on most boats. I went the servo tester route during bench testing and that worked, but is there another solution a bit more durable ?