9.200,00 €
White Cowling
Power Trim & Tilt
Dual Flush System
Owner’s Manual
The Yamaha 425hp White XTO Outboard Engine XF425XSB2 represents the absolute pinnacle of offshore outboard engineering, delivering unmatched power, precision handling, advanced digital controls, and long-term reliability for serious offshore boaters. Built around a massive 5.6-liter V8 platform, this revolutionary outboard is designed to dominate deep-water conditions while maintaining superior fuel efficiency, smooth operation, and uncompromising durability.
From tournament anglers and long-range cruisers to commercial operators and performance enthusiasts, the Yamaha 425hp White XTO Outboard Engine XF425XSB2 delivers an entirely new level of offshore confidence. With industry-first direct-injection four-stroke technology, fully integrated electric steering, and Yamaha’s advanced Helm Master® EX control systems, this engine redefines what modern offshore propulsion should be.
The Yamaha 425hp White XTO Outboard Engine XF425XSB2 is engineered from the ground up to meet the demands of today’s largest offshore boats, delivering extraordinary torque, smooth acceleration, ultra-precise handling, and industry-leading electrical power generation. Designed through years of collaboration with elite boat builders, marine engineers, and offshore captains, the XTO Offshore is not just an outboard motor — it is a fully integrated propulsion system.
At the heart of this machine is a naturally aspirated 5.6-liter V8 engine featuring a remarkable 12.2:1 compression ratio and high-pressure direct fuel injection delivering up to 2,900 PSI. This advanced design generates explosive power while maximizing combustion efficiency, resulting in both superior acceleration and reduced fuel consumption across the full RPM range.
Paired with Yamaha’s award-winning Phase Angle Control Charging system, electric power steering, and digital electronic controls, this platform offers unmatched control, reliability, and confidence — even in the most demanding offshore environments.
With a class-leading 425 horsepower, the XTO Offshore V8 delivers relentless thrust across the entire power band. Whether pushing heavy center consoles, luxury sport yachts, or multi-engine offshore fishing rigs, this engine supplies massive torque where it matters most — low and mid-range RPM.
Key Performance Highlights:
5.6L naturally aspirated V8 configuration
12.2:1 compression ratio
Direct fuel injection (up to 2,900 PSI)
Massive torque for rapid acceleration
Exceptional top-end speed
Unlike traditional EFI systems, Yamaha’s direct injection technology sprays fuel directly into the combustion chamber. This results in:
More complete fuel burn
Higher thermal efficiency
Improved cold starts
Cleaner emissions
Better fuel economy
This advanced system allows the engine to maintain exceptional throttle response while optimizing fuel delivery in real time.
One of the most important advancements in the XTO platform is the fully integrated electric steering system. Unlike conventional hydraulic systems, electric steering provides:
Instant steering response
Reduced mechanical complexity
Lower maintenance requirements
Smoother low-speed maneuvering
Superior docking precision
This is especially beneficial for large offshore boats equipped with multiple engines, where precise helm control directly impacts safety, handling, and operator fatigue.
The Yamaha 425hp White XTO Outboard Engine XF425XSB2 integrates seamlessly with Yamaha’s Helm Master® EX system, providing advanced boat handling and automation features:
SetPoint® position holding
DriftPoint® automatic drift correction
FishPoint® GPS anchoring
Pattern Shift™ programmable routes
Auto trim and throttle synchronization
This system dramatically simplifies docking, trolling, and station keeping — even in challenging wind and current conditions.
This patented system diverts exhaust away from the propeller below 2,500 RPM, improving prop bite during low-speed operation. This allows:
Better low-speed handling
Enhanced docking precision
Improved maneuverability
Superior reverse thrust
The XTO Offshore delivers unmatched electrical output, essential for modern offshore boats packed with electronics, pumps, livewells, refrigeration, and entertainment systems.
Electrical Output Capabilities:
Up to 96 amps net charging at idle
Up to 480 amps in five-engine configurations
65% higher idle charging compared to previous models
This ensures uninterrupted power even when running extensive onboard electronics at low RPM.
This heavy-duty mounting design minimizes vibration and improves stability by distributing loads across a wider structural area. The result is:
Reduced vibration
Smoother operation
Enhanced hull integration
Improved long-term durability
This smart tilt pump system automatically shuts off at full trim, preventing unnecessary power draw and reducing system noise while extending hydraulic component lifespan.
Engine Type: Yamaha XF425XSB2 XTO Offshore White Four Stroke
Horsepower: 425hp
Cylinders: 8
Displacement: 5.6L
Shaft Length: 25″ X-Long
Fuel System: Direct Injection (Up to 2900 PSI)
Throttle / Shift: Digital Electronic Controls
Steering: Integrated Electric Power Steering
Starting System: Electric
Alternator Output: 100 Amps
Weight: 952 lbs
Full Throttle Range: 5000 – 6000 RPM
Trim Range: -4° through +16°
Tilt Range: -4° through +73°
Warranty: Yamaha 3-Year Warranty
This engine delivers consistent power output regardless of sea conditions, ensuring confident operation across long offshore runs.
Built using corrosion-resistant alloys, quad thermostats, iridium spark plugs, and heavy-duty internals, the XTO platform is engineered for longevity in harsh saltwater environments.
Direct injection combined with high compression improves fuel atomization, reducing waste while maximizing combustion efficiency.
Electric steering eliminates hydraulic fluid systems, reducing leaks, hose failures, and routine service costs.
Industry-leading 425hp output
Advanced direct injection system
Integrated electric steering
Massive charging capacity
Superior torque and acceleration
Outstanding offshore reliability
Higher upfront investment
Heavy-duty installation requires professional rigging
Designed primarily for offshore vessels
Multi-engine configurations on 40+ foot center consoles benefit from exceptional hole-shot, top speed, and maneuverability.
Provides silent operation at idle, smooth cruising, and massive electrical output for onboard systems.
Reliable power delivery and long-term durability reduce downtime and operating costs.
From an engineering perspective, the Yamaha 425hp White XTO Outboard Engine XF425XSB2 stands apart due to its integration approach. Instead of simply increasing displacement or RPM, Yamaha redesigned every critical system: combustion, cooling, electrical generation, steering, mounting, and exhaust.
This holistic engineering approach allows the engine to operate at lower stress levels while delivering higher output. The result is improved longevity, reduced service intervals, and superior overall reliability — critical factors for serious offshore operators.
Use premium marine-grade fuel for optimal injector performance
Follow Yamaha-recommended service intervals
Pair with Helm Master® EX for maximum handling control
Ensure professional installation and rigging
Flush the engine after every saltwater run
Compared to other high-horsepower offshore outboards, this engine offers:
Higher torque output
Superior charging capacity
Advanced digital integration
Lower long-term operating costs
Proven Yamaha reliability
Its unmatched engineering and system-level design make it the preferred choice among offshore captains and performance boat builders worldwide.
The Yamaha 425hp White XTO Outboard Engine XF425XSB2 represents the ultimate evolution of offshore propulsion technology. By combining massive V8 power, direct injection efficiency, electric steering precision, and unmatched charging capability, Yamaha has created an outboard system that delivers superior performance, safety, reliability, and control.
For serious offshore boaters demanding uncompromising quality and power, the Yamaha 425hp White XTO Outboard Engine XF425XSB2 remains the gold standard. Contact us
Large offshore center consoles, sport yachts, luxury cruisers, and commercial offshore vessels benefit most from its power and torque.
Yes, it integrates fully with Yamaha Helm Master® EX digital control systems.
It uses high-pressure direct fuel injection delivering up to 2,900 PSI for optimal efficiency and power.
Up to 96 amps net at idle and up to 480 amps in five-engine installations.
Yes, electric steering reduces mechanical complexity, leaks, and maintenance while improving response.
The Yamaha 425hp White XTO Outboard Engine XF425XSB2 includes a 3-year factory warranty.
Yes, it supports twin, triple, quad, and quint installations.
Its fully integrated design combines propulsion, steering, power generation, and digital control into one cohesive system.
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