I've used different scooters over the years on the surface to tow myself in really bad viz. It's kinda tricky though and, as Tbone mentioned, inefficient. Basically you still need to be in a snorkelling position, face down in the water, with scooter below you, and pop your head up periodically to maintain direction. I breath off my reg doing it as I don't carry a snorkel. Keeping your head out of the water makes it pretty messy as the prop wash sprays in your face unless the scooter is a few feet under the surface and level and you act like a boat anchor being towed behind it.