I looked heavily at buying a new Yamaha 190 before I bought my used Regal 1800LSR. Yamaha purpose built the motors in those boats for marine use, unlike some marinized P.O.S. GM motor. I believe that 4cyl motor pumps out a hearty 180 hp. Considering my Regal's VP churns out 190 hp from a big 4.3L V6, that's really impressive. By nature, the jet drive is far more efficient in translating the crank power to the pump that any typical I/O set up as well, so you have far less power loss at the Yamaha's jet pump than the I/O's propeller. There's also nothing to lop off, if you should accidentally end up in shallow water with the Yamaha. They're impressive boats. A lot of the guys put "thrust vectors" on the jet drive in order to help maneuver the boat at slow docking speeds. I dunno why Yamaha hasn't started installing those from the factory yet, but they should!