Meet Yamahas award-winning V6 4.2-liter outboards. Fusing power, efficiency, speed and light weight, their intelligent design absolutely sets the standard for offshore performance. And now, you can add versatility to that list. With all V6 4.2L models “ F300, F250 and F225 “ available in both mechanical and digital control, you can step up your power, without rebooting your rigging. Seventeen percent more fuel efficient at cruise RPM*, up to 73 pounds lighter than some competitors and more than 10 years of proven Yamaha reliability.
Power & Performance
4.2 Liter Big Bore Displacement: Yamahas 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 œmicro-textured cylinder walls that help decrease friction loss, and further increase performance and enhance reliability.
Best-in-Class Fuel Efficiency: Our 4.2-liter V6s are up to 17 percent more fuel efficient at 3500 RPM than other four-stroke V6's.* 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. (*Testing conducted by Yamaha at Yamahas test facility on a Grady-White 257 Advance, with each boat rigged for maximum performance.)
Lightest Weight in Class: 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. Theres even a new advanced polymer composite lower engine pan that lowers weight and increases corrosion resistance. The 4.2-liter V6's are up to 73 pounds lighter than other four strokes in their class, at 562 pounds (digitaL and 551 pounds (mechanical).
Throttle Response & Acceleration: Yamahas 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 Yamahas new 4.2-liter big-bore V6 outboards deliver awesome hole shot and mid-range acceleration.
Cruising Speed: The Yamaha F300 is up to 19% faster at cruise RPM than other 300-hp four-stroke outboards.* Cruise RPM is where most offshore outboards are typically operated, meaning you get there faster, using less fuel, than competitive models. *Testing conducted by Yamaha at Yamahas test facility on a Grady-White 257 Advance, with each boat rigged for maximum performance.
Reliability & Durability
Protection from the Elements: All Yamaha V6 4.2-liter outboards feature a proven cowling drain system, to easily and efficiently drain away any water that enters the cowling during normal engine operation. Incoming air is routed through a labyrinth of passages that trap and drain water before it enters the engines intake, for maximum reliability.
Vibration Reduction: Yamaha V6 4.2-liter outboards utilize our Long Span Mounting System, which employs a specially formulated rubber compound attached to newly designed engine mounts. Placed as far apart vertically and horizontally as practically possible, they provide necessary strength while minimizing vibration.
Increased Cooling Capacity: Yamaha V6 4.2-liter models come standard with dual pairs of water inlets for increased cooling efficiency. Located on the front and both sides of the lower unit, each pair of pick-ups operates independently of each other to provide proper water flow in a wide variety of applications and conditions.
Reliability & Efficiency: For increased reliability, individual intake and exhaust camshafts provide more precise valve timing control with fewer moving parts than conventional rocker arm systems. This superior design also allows for the use of four valves per cylinder, which exchange intake and exhaust gases more efficiently for responsive power and increased fuel economy.
Convenience & Control
Best-in-Class Charging Power: With up to 70 amps of total alternator output, our V6 4.2-liter outboards have over 29 percent more charging power than other V6 four strokes, and ample charging for an array of on-board electronic devices.
Precise and Convenient Trolling: Our Variable Trolling RPM Switch (VTS) allows you to adjust trolling speed from 600 ~ 1000 RPM, in 50-RPM increments, for consistent trolling speeds in any conditions.
More Information / Security: Command Link Plus features a 6-inch high-contrast, multi-engine, LCD or an-all new 7-inch touchscreen display; digital electronic controls; key switches and start/stop panels; and more flexibility and information than ever. Its optional Y-COP theft-deterrent system disables the ignition and fuel systems while docked.
Smooth Shifting: Our patented Shift Dampener System (SDS) absorbs the resulting force of shifting gears, greatly reducing the noise commonly associated with shifting.
Model Specific Features
Perfect for offshore dual or center consoles, walkarounds, runabouts and pontoons, the 4.2-liter F250 allows you to step up your horsepower and displacement without replacing your rigging.
Compatible with mechanical (25" shaft) or digital controls
Recommended fuel: 87 Octane
Shaft lengths available: 25 and 30
Alternator output: Up to 70 amp
Engine Type: V6
Bore x Stroke: 96 x 96mm (3.78 x 3.78in)
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
Weight*: 250 kg (551 lbs)
Recommended Fuel: Octane 87
Recommended Engine Oil: Yamalube 4M (See owner's manual)
Recommended Fuel Filtration: Yamaha 10-Micron Fuel / Water Separating Filter (external)
C.A.R.B. Rating: 3-Star
Exhaust: Through Propeller
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 w/with filter
Recommended Cooling: Thermostatic Control
Ethanol Blend Limit: 10% Maximum
Gear Ratio: 1.75:1
Gear Shift: Forward, Neutral, Reverse
Shaft Length: 25"
Degree of Tilt: 67Â°
Degree of Trim: -3Â° through +16Â°
Dry Weight: 25" shaft / 249 kg (551 lbs)
Mounting Centers: 28.5"
Steering Angle (maximum): 32Â° from center, either direction
Warranty: Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial
*F300 testing conducted by Yamaha at Yamahas test facility on a Grady-White 257 Advance, with each boat rigged for maximum performance Weight refers to shortest shaft length, and is measured without motor oil, gearcase oil and propeller (except models 25 hp and under, which include a standard propeller). All Jet model weights include the jet pump assembly (weight estimated).