by GreenLake » Wed Feb 24, 2021 8:30 pm
I don't think so. I'm using an electric outboard w/ > 24" and used a trolling motor before w/ 36" shaft length. Both mounted directly on the transom (on a DS1). The prop diameter for the electric outboard is larger than typical for an outboard, so 20" should be fine, particularly if you are mounting on some bracket that might allow you some additional adjustment.
~ green ~ lake ~ ~