I feel your pain, we had a steel bridge very similar here in spring city, problem was US 27 was 4 lanes and the old bridge over piney River could not accommodate. It's been gone a good while and I miss it.
Never had one but I guess you had a bad experience. My neighbor liked his, I almost bought it and probably should have, it was old and had a good merc 6 on it, he traded it for a pontoon since he has grandkids..
Yea, I had to Google it too, I see a fundamental problem with keeping the nozzles from clogging.
The concept is good but distilled water would be the only way for it to be useful for any length of time.