Can think of two that were made for the maine coast, one in the 90s with bmg a traktor jet, then another in the early 2000s. Neither were long lived, to my knowledge both were converted to props with some form of fairly substantial hull work. Remeber the one from the early 2000s showing up in the national fisherman publication, then later that year showing up for sale cheap on a brokerage web site. Then a few months later appearing in the background of the "around the yards" segment getting some serious work done. Never a good sign for a new product.
Jets have a trade off, they do have some serious benefits for fisheries like Bristol bay or similar shallow draft net/gear intensive fisheries. I have a fishery that benefits from jets, the boat is really good at what it does. When in deep water running pots or long lines... its worse than my keel and prop boat in every metric. It dominates in the extreme shallow, but is a workout running down a string of gear with even minor tide and a small breeze.
Seems like the twin setups do much better, the jets work off eachother and the boat stabilizes better for running pots.
Best way I can describe hauling pots with a single big jet... think it was top gear in the old days that put put casters on the back of front wheel drive cars to simulate drifting easily. They eventually were able to drive but it was chaos and a full time job to keep the cars pointed in the right direction. Hauling gear with my big single was basically slitht adjustments on the jog lever while manipulating the trolling valve for an optimum run down gear. Big single jet was constant adjustment to the bucket dump and throttle with emphasis on the jog lever and bowthruster lever for extra help... like a kid button mashing a video game controller.
Its a possibility with the modern joystick systems those issues could be solved or made much easier, but at cost and scale of complexity.
