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Yamaha’s Biggest Outboard Ever!


Yamaha Marine in May launched its XTO Offshore platform by introducing the XF425, a 425-horsepower, four-stroke outboard that is the company’s highest-horsepower offering to date.

“This is an integrated outboard system, designed to push the heaviest offshore boats and yachts,” said Ben Speciale, Yamaha Marine Group President. “The new Yamaha V8 XTO Offshore has 5.6-liters, tremendous thrust and 425 horsepower. The V8 XTO Offshore provides extreme performance for the biggest boats.”

The XF425 features a number of industry firsts and innovations, including the highest-ever compression ratio (12.2:1) in a four-stroke outboard, the first direct-injection system in a four-stroke outboard, a first-of-its kind integrated electronic steering system, Iridium spark plugs and plasma-fused, sleeveless cylinder liners. Also new is a clever exhaust system that directs exhaust gasses away from the propeller, resulting in a 300 percent increase in thrust over the company’s previous horsepower king, the F350.

Other notable features and improvements include a four-thermostat cooling system (two per cylinder bank) that ensures even cooling of internal components, a quick-connect hose bib that allows the lower unit gear lube to be changed while the boat is still in the water and an additional 3.25 inches of clearance when tilted fully up when compared to the F350.

The XF425 will be available in August in gray, pearlescent white or unpainted, for owners who want to customize. Available shaft lengths include 25-, 30- and 35-inch models. The XF450 starts at $44,000.

This article originally appeared in the August 2018 issue.



Yamaha Introduces Its Biggest-Ever Outboard

Yamaha Marine last week took the wraps off its 5.6-liter XTO Offshore platform by introducing its biggest outboard offering to date, a 425-hp, four-stroke outboard called the XF425. Designed from the propeller up for big offshore boats, the XF425 boasts a number of innovations and industry firsts.


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