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Explore the game-changing innovation inside the 4.2L Four Stroke V MAX SHO®. Mouse over the hot spots and toolbar icons for in-depth descriptions of outboard features and benefits.
All V MAX SHO® outboards utilize a large, on-engine water separating fuel filter with a water sensor. Used in conjunction with Yamaha’s 10-Micron Water Separating Fuel Filter, it helps separate water and contaminants from the fuel before they can reach the outboard’s other filters and fuel injectors.
The 4.2 liter big-bore V MAX SHO® four stroke outboard averages 12% better fuel economy throughout the RPM range than our venerable 3.3 liter direct-injected 250HP V MAX Series 2 two stroke. All air entering the engine block of the V MAX SHO® is routed through a single 75mm electronically controlled throttle valve. Working in concert with the Precision Multi-Point Fuel Injection System, they help ensure the precise amount of air and fuel necessary for optimum power and fuel efficiency. The reduction in friction from the Micro-Textured Cylinder Walls further adds to this outboard’s amazing fuel economy.
Yamaha’s Variable Camshaft Timing system advances and retards the position 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 V MAX SHO® four stroke provide awesome hole shot and mid-range acceleration you have to feel to believe.
By using a highly advanced thermally applied plasma fusion process on the cylinder walls, the V MAX SHO® has no conventional steel cylinder sleeves, yet the cylinder walls are 60% 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, better cooling, and the “micro-textured” cylinder walls help reduce friction, further increasing performance and enhancing reliability.
4.2 liters of class-leading displacement teams with individual intake and exhaust camshafts to provide more precise valve timing control with fewer moving parts than conventional rocker arm systems for increased reliability. This superior design also allows for use of 4 valves per cylinder which exchange intake and exhaust gases more efficiently for responsive power and increased fuel economy. Intake valves are 14% larger and exhaust valves are 10% larger than our 3.3L DOHC system.
Yamaha’s exclusive In-Bank™ Exhaust System exits downward through the center of the engine between the “V” of the cylinders, rather than on the exterior side. This increases combustion efficiency for more power and torque, and also provides for a more compact shape.
Engine exhaust is routed through a maze before exiting above the waterline through the idle exhaust relief outlet, for unbelievably smooth and quiet operation. A mufflerless design creates a more direct exhaust flow and a pleasing sound of power at idle.
The Yamaha V MAX SHO® is 34 pounds lighter than the V MAX Series 2 it replaces. In fact, no other equivalent-horsepower production V6 bass outboard is lighter, including two strokes. From the specially redesigned engine bracket to the new lightweight cowling, every ounce of weight-savings has been realized without sacrificing durability. There’s even a new advanced polymer composite lower engine pan that helps reduce weight.
Yamaha’s new V MAX SHO® four stroke out-board utilizes an advanced sensor that allows maximum safe ignition timing. The resulting hole shot and acceleration is so amazing that it outperforms popular two stroke models, and comparable or better top speed performance gets you to your next spot fast - even if it’s miles away. It’s a difference you can feel.
The Yamaha V MAX SHO® is faster than even the vaunted V MAX Series 2 that it replaces. This means four stroke smoothness, convenience, and reliability; with top speed better than that of our direct-injected two-stroke of comparable horsepower.
The specially contoured high-performance lower unit features a unique curved skeg design* for straighter tracking, while forward-mounted water inlets are redesigned, repositioned, and substantially larger than V MAX Series 2 for increased cooling capacity and efficiency. Inside are specially heat-treated gears for increased durability. These lower units are stock factory production, not an aftermarket add-on, so they're covered by Yamaha's 3-year limited warranty for pleasure or government use.
*not available on the VF250 X Shaft
With 46 amps of total alternator power at 1000 rpm and a full 50 amps from 2500 ~ 6000 rpm, V MAX SHO® outboards offer the kind of charging power needed to help operate today’s wide array of on-board electronic devices.
V MAX SHO® outboards have an exhaust pressure reduction system, which not only helps keep the propeller hub cooled from hot exhaust gases, it also helps provide power by transitioning those gases out of the engine during the critical hole shot and acceleration phases.
Yamaha V MAX SHO® outboards are cable-actuated, mechanical remote controlled. This allows use of our 6X3 flush side-mount remote control. You can even add your own foot-operated throttle for additional convenience.
Command Link® Gauges (optional) provide accurate, real-time stats on engine operating conditions and selected boat systems. Utilizing true digital communication, the easy-to-read gauges are designed to withstand the elements, and engineered specifically to track the performance of your Yamaha outboard.