5.6 litres of naturally aspirated V8 power
Discover Yamaha's very latest technology. With features such as five-pump Direct Fuel Injection, Variable Camshaft Timing (VCT), Double Overhead Camshafts (DOHC), dual chamber oil pump, two-stage water pump, quadruple thermostats, and our unique in-bank exhaust system.
Integrated Digital Electric Steering
Owners love this highly efficient built-in steering system that delivers a smoother and more intuitive experience when at the helm. It is lighter and less complex than a separate hydraulic system plus is cleaner to fit and operate, and far quicker and simpler to rig.
Simple maintenance, super charging
Leave your boat at the dock as you execute an easy in-water gear oil change, simplifying the whole process. A multi-part cowling with quick-access locks allows secure, easy access for maintenance and adjustments. Finally, the High Output system provides stable charging even at low rpm
TotalTilt™ function with integrated tilt limit
Yamaha’s exclusive TotalTilt™ function allows complete tilt up or down, from any position, with a simple double-push of the respective tilt button. A buzzer sound alerts crew to keep clear of the outboard, and the integrated tilt limiter helps to prevent inadvertent damage.
Ultimate efficiency from Direct Injection
Yamaha is on a mission to deliver ever-greater efficiency and economy, and the fuel system on the XTO 400hp V8 is the ideal example of how we execute on this objective, from the first-ever Direct Injection 4-stroke engine to the thrust-enhancing reverse exhaust system.
Built to last.
Every aspect of the XTO 400hp V8 offers best-in-class build quality. Massive crankshaft, torque-absorbing heavy-duty gears, an extra-large diameter prop shaft and the gearcase design, with its low friction co-efficient and more effective cooling, all contribute to reliable performance.
Thrust-enhancing reverse exhaust system.
This system expels the exhaust using a combination of three different routes, depending on the rpm level. The result is approximately 300% more reverse thrust, better balance between forward and reverse thrust when maneuvering with Helm Master EX®, and greater efficiency at full power.
Turn up the torque and increase control
Discover Xtreme Thrust Output. This V8 unit provides power, performance and precision control. When paired with our unique Helm Master EX® system, you experience a seamlessly integrated power and control solution for larger offshore boats.
Technical SpecificationsDownload factsheet
- Engine type
- 4-stroke, DOHC, V8
- 5,559 cc
- No. of cylinders/configuration
- Bore x stroke
- 96.0 x 96.0
- Prop shaft output at mid range
- 400hp @ 6,000 rpm
- Full throttle operating range
- 5,000 - 6,000 rpm
- Lubrication system
- Wet sump
- Fuel Induction System
- Direct Injection
- Ignition / advance system
- Electronic ignition (TCI)
- Starter system
- Electronic ignition (TCI)
- Gear ratio
- 25/14 1.79
- Oil pan capacity
- 7.8 l
- Weight without propeller
- 437 kg - 458 kg