One of my colleagues, who had a sailboat, called all boats driven by an engine, stink-pots. Merriam-Webster
A boat equipped with a motor.
See Sailing Yachts v Stinkpots in the Financial Times. This article, which the FT does not want me to excerpt, well conveys the disdain that sailors feel for "motorized pleasure craft". In the case of the authors of this article, they are somewhat abashed at their disdain.
The article refers to the book Coot Club by Arthur Ransome,
The most entertaining piece of anti-stinkpot propaganda ever written.
I am sure the owners of "motorized pleasure craft" have equally derogatory terms for sailboats, and perhaps another person will supply one.