Yamaha outboard engines: The Face of Innovative Marine Engineering. Sit back and take in the boating vista in this part of the world, from the busiest marina to the local boat ramp, and the evidence is right before your eyes. Yamaha builds the worlds most popular outboards. Outstanding Fuel Economy and Clean Emissions. we offer Yamaha outboard motors, full model lineup in Yamaha outboard four stroke engines from 425ps to 2.5ps and Yamaha outboard two stroke engines that deliver superb fuel economy