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Yamaha's revolutionary High Pressure Direct Injection was a giant technological leap, delivering fuel at an amazing 700 psi, vs. the paltry 90-450 psi of conventional direct injection. The difference in power to plane, acceleration, top-end speed, and fuel economy was nothing short of amazing. The big news for 2003 is our new V6 250-horse big block HPDI - an all-new, marine-inspired 3.3-liter, 204 ci, 76° big block with the next-generation Yamaha HPDI. The pressure's been turned up to an incredible 1000 psi. And with it, the enhanced power, performance and extended range and economy associated with HPDI. You also get smooth, quiet operation. A unique sound-dampening system makes our HPDIs dramatically quieter than conventional two-strokes. And they're so clean-running, they exceed the Federal EPA 2006 emission requirements, as well as earning a California C.A.R.B. two-star rating for very low emissions.YAMAHA'S NEW BREED OF POWER BROKERS. 250 HORSES OF HPDI PERFORMANCE.
It's the dawn of a new day in offshore power, performance, range and reliability. The 250 HPDI is the most powerful offshore outboard we've ever made. An all-new 3.3-liter V6 big block that delivers up to 20% more low-end torque and acceleration. We've upped the fuel injection to an industry-high 1000 psi - a 40% increase in pressure that kicks performance into the stratosphere. You won't believe the hole shot and top-end speed. And the increased fuel economy and range will take you farther out, where the big ones are waiting. Every component works in perfect harmony to maximize performance and fuel efficiency.
Using data supplied by six sophisticated sensors, the microcomputer Engine Control Module (ECM) precision adjusts ignition timing, air/fuel mix and other vital settings. In fact, in recent tests, HPDI showed up to a 35% increase in fuel economy, at speed, over a conventional EFI. Yamaha's famed reliability is also enhanced. The ECM ensures instant, trouble-free starts. Internal-opening injectors resist carbon buildup. Strong-forged pistons, a unique piston ring design, a new gear case with lower water pickups for enhanced cooling, an outstandingly efficient alternator that keeps batteries always charging while running - the list goes on. You can't count on the weather or the fish, but you can count on your Yamaha.
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