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XTO Offshore V8 5.6L 425 HP

Yamaha’s new, purpose-built 5.3-liter 350-horsepower V8 outboard leaves the competition in its wake by delivering reliability, style and confidence when you’re taking control of the open water. Now available in signature Yamaha gray or new pearlescent white

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Features
Specifications

4.2 Liter Big Bore Displacement

Yamaha’s 4.2-liter V6 Offshore outboards feature plasma-fused sleeveless cylinder walls, which are 60 percent harder than steel. That means larger cylinder bores for increased displacement, resulting in more power and torque, without increasing outer cylinder dimensions. It also results in dramatically lighter weight and better cooling, and “micro-textured” cylinder walls that help decrease friction loss, and further increase performance and enhance reliability.

Fuel Efficiency

For maximum power and efficiency, electronically controlled throttle valves work in concert with Precision Multi-Point Fuel Injection to ensure a precise mix of air and fuel. In addition, six individual sensors constantly provide vital atmospheric and engine conditions to the Engine Control Module (ECM), which makes adjustments for performance.

Light Weight

From the top of the cowling to the tip of the propeller shaft, every ounce of weight-savings has been realized for maximum performance without sacrificing durability.

Throttle Response & Acceleration

Yamaha’s Variable Camshaft Timing system advances and retards the angle of the intake camshaft to dramatically increase power and throttle response in the low- and mid-RPM ranges. This feature helps Yamaha’s new 4.2-liter big-bore V6 outboards deliver awesome hole shot and mid-range acceleration.

Responsive Electric Steering

Yamaha’s Variable Camshaft Timing system advances and retards the angle of the intake camshaft to dramatically increase power and throttle response in the low- and mid-RPM ranges. This feature helps Yamaha’s new 4.2-liter big-bore V6 outboards deliver awesome hole shot and mid-range acceleration.

 

Engine Type V6
Displacement 4.2L
Bore x Stroke 96 x 96mm (3.78 x 3.78 in)
Prop Shaft Horsepower 300hp at 5500 rpm / 250hp at 5500 rpm / 225hp at 5500 rpm
Full Throttle RPM Range 5000 ~ 6000 rpm
Alternator Output at W.O.T. 50 - 70 Amp
Compression Ratio 10.3:1
Fuel Induction System EFI
Weight250 kg (551 lbs) / 254 kg (562 lbs) / 265 kg (588 lbs)
Recommended Fuel Octane 89
Recommended Engine Oil Yamalube® 4M (See owner's manual)
Recommended Fuel Filtration Yamaha 10-Micron Fuel / Water Separating Filter (external)

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