One Mean Engine, The All New Yamaha 425HP V8 Has Arrived

One Mean Engine, The All New Yamaha 425HP V8 Has Arrived

Looks to be one very impressive engine.  The fact that it has true electronic steering (fly by wire) is amazing.  So are the 17″ props!

Yamaha Marine has officially unveiled the monstrous V8 XTO Offshore, a 425-horsepower, naturally aspirated 5.6L outboard.

The new engine, which will be start shipping in August, carries a five-year limited warranty for pleasure use and comes in three different shaft lengths – 25 inches, 30 inches and 35 inches. When fitted with a propeller and filled with motor and gearcase oil, the 35-inch XTO weighs more than 1,000 pounds. “This engine is designed to take us to the next level of what we can possibly do with outboard motors within the industry,” Speciale added. “We are answering the call for bigger boats with a different platform, a new, big-block 5.6L V8. It’s all about integrating power systems into much larger boats.”

New XTO OS propellers are made to complement the torque potential of the Yamaha V8 XTO Offshore. These new propellers produce more thrust in both forward and reverse, using diameters from 16 to 17 1/8 inches.

“We doubled our quality standards on this engine,” Speciale said. “Here’s what I mean by that. If we were previously doing 200 hours of testing, we went to 400 hours. If we were doing 400 hours, we went to 800 hours. We spent a lot of money on fuel [testing this engine].”

The V8 XTO Offshore steering system has no hydraulic lines or linkages. The steering control unit receives electrical signals from a cylinder position sensor to carry out joystick and steering operation. “This engine has a fully electric steering system,” Speciale said. “When you rig it, you plug in a harness.” Boats powered by the V8 XTO Offshore need go no further than the dock for a lower unit service, thanks to a new gearcase lubricant exchange system that allows fluid change while the boat is still in the water.“Today’s boaters want to customize their boating applications to make their experiences on the water even more enjoyable,” Speciale said. “These new feature-rich offshore products give boaters more options and versatility when it comes to boat control, maneuverability and propulsion.” 

[via Yamaha Outboards & Boating Industry]

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