Power & Performance
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.
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.
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.
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.
The Yamaha V6 Offshore F300 and F250 are the industry’s very first offshore V6’s offered in digital models with built-in electric steering. This makes them incredibly responsive and also results in a cleaner bilge, with no pumps, hoses, hydraulic lines or connections.
Convenience & Control
Charging Power
Our V6 4.2-liter outboards feature up to 70 amps of total alternator output—ample charging for an array of on-board electronic devices.
Precise And Convenient Trolling
Speed Control with Pattern Shift automatically bumps engines into and out of gear to achieve sub-idle trolling speeds. Helm Master EX with Autopilot even allows you to set a target speed, as low as 0.25 mph. This cues the system to auto-adjust RPM and shifting to achieve that target speed—all while adjusting for conditions such as wind or current. This provides incredible control of trolling speed—from in-gear idling to slowing to a crawl.
More Functionality / Security
Our digital V6 Offshore models are compatible with Helm Master® EX boat control system. Helm Master EX offers functionality including Autopilot with Heading/Course Hold, 10+ automated modes for fishing and relaxing, in-mode joystick adjustability, the expanded ability to control up to five outboards and more. There’s even an optional theft-deterrent system, Y-COP®, which disables the ignition and fuel systems while docked.
Top Speed And Smooth Shifting
Our new Saltwater Series II™ HP Propeller can boost top-end speed up by nearly 2 mph in lighter-weight applications. It’s also equipped with our patented Shift Dampener System (SDS®) for smoother, quieter shifting.
Fast, Easy Tilting
A new, Yamaha exclusive, TotalTilt™ performs a quick, full trim up or down with the fast, double-tap of a button. This makes trailering quick and easy and is handy when a complete up or down tilt is needed.
Powerful, Precise Maneuvering
Thrust Enhancing Reverse Exhaust keeps exhaust bubbles away from the propeller below 2500 RPM and when in reverse. This means the prop bites only clean water, which results in outstanding reverse thrust and control—especially when backing down on fish and when maneuvering around docks.
Specs & Compare
| Engine Type | V6 |
| Displacement | 4.2L |
| Bore x Stroke | 96 x 96mm (3.78 x 3.78 in) |
| Prop Shaft Horsepower | 250hp 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 |
| Max Output | 183.80KW |
| Recommended Fuel | Octane 89 |
| Recommended Engine Oil | Yamalube® 4M |
| Recommended Fuel Filtration | Water Separating Filter (external) |
| C.A.R.B. Rating | 3-Star |
| Exhaust | Through Propeller |
| Intake | 24 |
| Ignition | TCI Microcomputer |
| Spark Plug | LFR6A-11 |
| Alternator Output | 50 – 70 Amp |
| Starting System | Electric |
| Lubrication | Wet Sump |
| Engine Oil Capacity | 6.3L/6.0L |
| Recommended Cooling | Thermostatic Control |
| Ethanol Blend Limit | 10% Maximum |
| Gear Ratio | 1.75:1 |
| Gear Shift | Forward, Neutral, Reverse |
| Shaft Length | 25″ – 30″ – 35″ (F250 DEC Only) |
| Degree of Tilt | DES: 69°, Mechanical 70° |
| Degree of Trim | -3° through +16° |
| Dry Weight with built-in DES | 277 kg – 288 kg |
| Dry Weight without built-in DES | 255 kg – 265 kg |
| Dry Weight with Mechanical Controls | 255 kg |
| Mounting Centers | 28.5″ |
| Steering | Integrated, Electric Actuation |
| Steering Angle (maximum) | 32° from center, either direction |
| Warranty | Limited 3-Year, 1-Year Commercial |
| 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 |
| 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 |
| Max Output | 220.6KW |
| Recommended Fuel | Octane 89 |
| Recommended Engine Oil | Yamalube® 4M |
| Recommended Fuel Filtration | Water Separating Filter (external) |
| C.A.R.B. Rating | 3-Star |
| Exhaust | Through Propeller |
| Intake | 24 |
| Ignition | TCI Microcomputer |
| Spark Plug | LFR6A-11 |
| Alternator Output | 50 – 70 Amp |
| Starting System | Electric |
| Lubrication | Wet Sump |
| Engine Oil Capacity | 6.3L/6.0L |
| Recommended Cooling | Thermostatic Control |
| Ethanol Blend Limit | 10% Maximum |
| Gear Ratio | 1.75:1 |
| Gear Shift | Forward, Neutral, Reverse |
| Shaft Length | 25″ – 30″ – 35″ (F300 DEC Only) |
| Degree of Tilt | Mechanical 67°, Digital Electric Steering 69°, Bolt-on steering 70° |
| Degree of Trim | -3° through +16° |
| Dry Weight with built-in DES | 277 kg- 288 kg |
| Dry Weight without built-in DES | 255 kg – 265 kg |
| Dry Weight with Mechanical Controls | 255 kg |
| Mounting Centers | 28.5″ |
| Steering | Integrated, Electric Actuation |
| Steering Angle (maximum) | 32° from center, either direction |
| Warranty | Limited 3-Year, 1-Year Commercial |