Interesting set up this guy is making for Hobie pedal drive yaks. Yeah it may be noisy, yeah you may breath some Carbon Mono, Yeah you have to register it in CA (torq and bixby have to be registered also). But I think its cool as it will outrun any battery operated propulsion system. His claim is it is really not that loud cause he uses Honda 4 stroke, and claims that the smell is not really noted while under way. Price point is cheaper to a Bixby but again you can go for hours. Was wondering if anyone seen one in person to report how loud and smelly it really is lol.
https://www.kayakbuddys.com/