ecco un comunicato Yamaha USA.
Da quanto si capisce esiste la nuova serie VMAX e la serie F 300/250/225 etc.. Sono distinte e probabilmente i 229 kg sono riferiti a questa serie, mentre i 253 sono della serie V Max. Che casino
Late Monday Yamaha Marine Group came to Chattanooga to announce the biggest product launch in the company’s history. The launch includes nine new outboards that officials say "reach new levels of reliability and overall customer satisfaction."
“Customer satisfaction is a moving target,” said Phil Dyskow, President, Yamaha Marine Group. “It includes expectations about power, performance and comfort – issues such as sound level and vibration – and, of course, the reliability of the outboard. A brand that wants to be on the top in customer satisfaction can’t ignore any aspect of the product. Consumers want it all, and we have to deliver.”
New Materials and Processes
Yamaha says it has applied innovative uses of materials and processes and taken a fresh approach to designing its new generation of outboards. The new generation includes the VMAX® SHO™ 250, 225 and 200; the new F300, F250 and F225 V6 offshore outboards; the new F6 and F4 portables; and the new mid-range F70.
The outboards feature reduction in weight through the use of new materials, and by a powerhead-engineering approach that seeks to gain the highest power output consistent with excellent long-term reliability.
Four Strokes that Run Like Two Strokes
At the top of the list of customer satisfying innovations is a family of four stokes that can outperform the best two strokes. Yamaha’s new VMAX® SHO™ outboards are as light or lighter than competing two strokes and deliver better hole shot and time to plane than Yamaha’s two-stroke VMAX® Series 2 outboards. Now anglers can enjoy the traditional virtues of the two stroke -- light weight and acceleration – with the virtues of a four stoke – clean, reliable, quiet operation. The VMAX® SHO™ is nothing short of a revolution for anglers.
One thing that characterizes all the new outboard powerheads in the Yamaha line is volumetric efficiency. That means each outboard gets as much fuel and air into the cylinder as possible, which has a positive effect on power and overall fuel economy.
The F300/F250/F225 family of outboards has an amazing 4.2 liters of displacement and uses a larger throttle valve. Inside, the new V6 powerhead has larger intake and exhaust valves. In addition, it uses both longer and larger intake tracks. Variable camshaft timing is also employed (and is new to the F225 and F200). All these features increase volumetric efficiency in the 4.2-liter V6s.
The Yamaha F70 uses a unique four-valve-per-cylinder head design in which the valves are actuated by a single camshaft instead of the more typical two-camshaft design. This highly unusual design not only allows greater intake and exhaust valve area – which contributes to volumetric efficiency – it also reduces the weight and parasitic losses that would result from using two camshafts instead of just one.
Reducing the Weight
Very seldom in engineering does adding one material to another result in decreased weight and increased efficiency, but that’s what one new process does in both the Yamaha VMAX® SHO™ and the new F300/F250/F225 V6 offshore family of outboards. The powerheads of these outboards use plasma fused sleeveless cylinders instead of a steel sleeve.
Not only does the process reduce the overall amount of powerhead weight, the resulting material – which measures about 0.1 mm thick – takes up less space in the engine block than a conventional steel sleeve, which means there’s more room for the pistons themselves. It is in this way that displacement has been optimized in the new 4.2-liter powerhead. The process has allowed Yamaha engineers to gain the greatest displacement from the least amount of mass in the engine block, which also reduces overall weight.
In addition, the micro-textured cylinder walls that result from the process create less friction, allowing the pistons to move more freely, thus reducing parasitic losses from friction.
Yamaha officials will showing off their new engines on the water at their testing facility in Bridgeport, Ala. Tueday morning.
Profiles of New Yamaha Outboards
Inshore, Offshore, Bass, Portable, Mid-Range: Something for Every Boater
The Game Changer: Four-Stroke V6 VMAX® SHO™
A revolutionary four-stroke outboard, the VMAX® SHO™ takes power to a whole new level within the bass fishing realm. It is noticeably faster out of the hole and to plane than the VMAX® Series 2 and has a broader power curve for smoother acceleration and performance. It also achieves higher speed over a measured distance and provides the best acceleration of the outboards in its class. Indeed, the VMAX® SHO™ is the lightest outboard in its class when compared to two-stroke competitors using filled reserve oil tanks. The VMAX® SHO™ family is comprised of 250, 225 and 200 horsepower versions.
The Versatile Performer: Yamaha’s New Four-Stroke F70
Yamaha’s all-new four-stroke F70 outboard is so light and versatile it can even be used in applications formerly reserved for some two-stoke outboards. Delivering an impressively high level of performance for its size, the F70 is a great lightweight alternative for aluminum fishing boats and has the best horsepower-per-liter ratio in its class, weighing 109 pounds less than Yamaha’s four-stoke F75. The F70 can be equipped with the Yamaha Multi-Function tiller handle and Command Link® gauges. It also has a handsomely designed compact exterior that gives it a family resemblance to Yamaha’s newer outboards.
The Truly Portable: Yamaha’s New Four-Stroke F6 and F4
Yamaha’s two new four-stroke portable outboards, the F6 and F4, weigh only 60 pounds (for the 15-inch shaft model) and with convenient built-in carrying handles – living up to the name, they are truly portable. The new F6 is 23 pounds lighter than the former F6, which makes it easier to handle and install. These outboards can easily go from the pickup bed of a truck or the trunk of a car to the transom in very little time, and they are powerful.
The Next Generation of Offshore Power: Yamaha’s New V6 Four-Strokes
Yamaha’s new offshore V6 four-strokes represent a new generation of offshore outboards designed to carry on Yamaha’s reputation for reliability, offering class-leading performance, the latest in innovation and technology. This new family of four-stroke offshore outboards has less weight than the previous generation. It also has everything else it takes to satisfy offshore fisherman and boaters. These new outboards are best-in-class in many measures.
The new family of outboards is compatible with the new Command Link® Plus. Command Link® Plus uses a unique 5-inch single LCD display that is the same height as the current Command Link® square gauge to make optimum use of space. Designed for configuration by the user, it has many display options for the outboard and the boat. In addition to speed, the LCD screen can display oil/water pressure, charge level, rpm, etc. It can also display fuel flow rate, tank levels, water temperature and water depth. It operates with single, twin or triple applications. (Quad applications require two displays.)
The Powerful F350: Now Equipped with Command Link® Plus
The new F350, the jewel in Yamaha’s offshore crown, is now compatible with Yamaha’s new Command Link® Plus, the latest generation of Command Link® that allows for expansion on the current menu of capabilities. The ultimate outboard is now equipped with the ultimate electronic system.
A Great Repower Solution: Yamaha’s Venerable F250
Due to popular demand, Yamaha is bringing back the venerable F250 “Mechanical Shift” as a solution for boaters who wish to repower without upgrading to a later electronic control box. Offering a great solution for boaters who are satisfied with their boats but simply want a new outboard, the F250 “Mechanical Shift” is the perfect replacement. The F250 is compatible only with cable-type control boxes. At the same time, it has the ability to use Command Link® electronic gauges. With the use of a gateway, it can also operate with NMEA-2000® compatible displays.