Industry Firsts Include Direct Injection and Integrated Electric Steering System
Y TIM HENNAGIR
Yamaha Marine has officially unveiled the monstrous V8 XTO Offshore, a 425-horsepower, naturally aspirated 5.6L outboard.
The new engine is designed to push heavy offshore boats and yachts, further positioning the company as a supplier to the growing saltwater center console market.
“We’ve been working on this for a lot of years,” said Yamaha Marine Group President Ben Speciale during a product launch and marine industry media event Tuesday night in Chattanooga, Tenn.
The XTO Offshore is an entirely new platform for Yamaha, Speciale said.
The new engine, which will be start shipping in August, carries a five-year limited warranty for pleasure use and comes in three different shaft lengths - 25 inches, 30 inches and 35 inches.
When fitted with a propeller and filled with motor and gearcase oil, the 35-inch XTO weighs more than 1,000 pounds.
“This engine is designed to take us to the next level of what we can possibly do with outboard motors within the industry,” Speciale added. “We are answering the call for bigger boats with a different platform, a new, big-block 5.6L V8. It’s all about integrating power systems into much larger boats.”
Pushing the heaviest offshore boats and yachts requires driving large propellers, a massive, rugged gearcase and an extreme powerhead.
As the first four-stroke powerhead in the outboard industry to use direct injection, the XTO sprays fuel at high pressure directly into the combustion chamber, rather than the intake track, just before the intake valve.
This system features five fuel pumps and injection pressure up to 2900 PSI. The new engine has the highest compression ratio in an outboard - 12.2:1.
Carbon-coated shimless bucket-type valve lifters also increase durability, while a dual-chamber oil pump ensures proper oil flow and delivery.
Plasma fusion replaces conventional steel cylinder liners. The micro-textured surface is 60 percent harder than steel and significantly lighter, contributing to increased displacement without increasing powerhead size.
The resulting surface also increases fuel economy by decreasing internal friction.
New XTO OS propellers are made to complement the torque potential of the Yamaha V8 XTO Offshore. These new propellers produce more thrust in both forward and reverse, using diameters from 16 to 17 1/8 inches.
The XTO Offshore also has a two-stage water pump and dual chamber oil pump, each designed for heavy loads associated with high RPM operation.
Spark plugs made from iridium provide improved throttle response, economy, increased service life and improved power. The new V8 XTO Offshore also features quad thermostats, with two thermostats per cylinder bank, for improved flow and better regulation of engine and oil temperature.
“We doubled our quality standards on this engine,” Speciale said. “Here’s what I mean by that. If we were previously doing 200 hours of testing, we went to 400 hours. If we were doing 400 hours, we went to 800 hours. We spent a lot of money on fuel [testing this engine].”
The V8 XTO Offshore steering system has no hydraulic lines or linkages. The steering control unit receives electrical signals from a cylinder position sensor to carry out joystick and steering operation.
“This engine has a fully electric steering system,” Speciale said. “When you rig it, you plug in a harness.”
A new exhaust-gas relief system helps produce reverse thrust up to 300 percent of that developed by Yamaha’s F350.
“The reverse system on this engine allows the exhaust to be above the propeller when the engine is put into reverse,” Speciale said. “The prop grabs clean water.”
Boats powered by the V8 XTO Offshore need go no further than the dock for a lower unit service, thanks to a new gearcase lubricant exchange system that allows fluid change while the boat is still in the water.
The V8 XTO Offshore’s charging capabilities provide up to 90 amps of total (gross) power, reaching a peak net output around 1,500 RPM.
Yamaha’s Helm Master and the CL7 display have also been updated along with the launch of the new XTO Offshore outboard.
“Today’s boaters want to customize their boating applications to make their experiences on the water even more enjoyable,” Speciale said. “These new feature-rich offshore products give boaters more options and versatility when it comes to boat control, maneuverability and propulsion.”
The latest version of Helm Master includes the following updates:
In StayPoint or FishPoint modes, one forward, rearward or sideward bump of the joystick will move the boat’s position 10 feet; additional bumps within 3 seconds of each other will move it up to 100 feet total;
In StayPoint or DriftPoint modes, one twist of the joystick will move the boat’s bow heading angle by 5 degrees; additional twists within 3 seconds of each other will rotate the boat by up to 50 degrees total;
A new feature called Pattern Shift allows the operator to troll below standard in-gear trolling speed by shifting into or out of gear to meet a desired target speed. In calm water, resulting minimum speed can be less than 0.5 mph;
Boaters can now adjust position and heading directly with the joystick. Prior versions required leaving a SetPoint mode, then adjusting, then re-activating the mode;
The FishPoint High Mode RPM setting remains adjustable for fine tuning the power requirements for each individual vessel’s needs or to match conditions;
The FishPoint center mode for quad engines now allows for quieter operation by using the center engines only for thrust and the outer for increased electrical charge output. The result is efficient, quiet charging.
Yamaha also announced it will offer a 35-inch shaft length model of the F300 4.2-liter Offshore V6
Yamaha V8 XTO Offshore™ Outboard Offers the Extreme
Industry Firsts Include Direct Injection and Integrated Electric Steering System
KENNESAW, Ga., May 23, 2018 — The new V8 XTO Offshore outboard is designed to take Yamaha’s premium quality brand position to a higher level with extreme power and thrust, toughness and reliability, system integration, control, convenience and customer care. Yamaha has achieved many of these extremes by rethinking the outboard and its related systems, and through the application of technologies new to the industry.
“This is an integrated outboard system, designed to push the heaviest offshore boats and yachts,” said Ben Speciale, Yamaha Marine Group President. “The new Yamaha V8 XTO Offshore has 5.6-liters tremendous thrust and 425 horsepower. The V8 XTO Offshore provides extreme performance for the biggest boats. Combine it with the latest generation of Helm Master® and Yamaha’s CL7™ Display, and you have benefits offered nowhere else.”
Extreme Power and Thrust
Pushing the heaviest offshore boats and yachts requires driving extreme, large propellers, a massive, rugged gearcase and an extreme powerhead. As the first four-stroke powerhead in the outboard industry to use Direct Injection, the V8 XTO Offshore is already a legend, spraying fuel at high pressure directly into the combustion chamber, rather than the intake track, just before the intake valve. This greatly improves atomization and increases the effectiveness of the fuel burn for maximum power and efficiency.
The Direct Injection system features five fuel pumps and injection pressure up to 2900 PSI. The three-stage fuel pressure system is in part comprised of two independent fuel pumps within the Vapor Separator Tank (VST) that activate at specific, individual RPM. This ensures proper fuel flow and delivery, even at very high engine RPM.
Yamaha’s V8 XTO Offshore also boasts the highest compression ratio in an outboard - 12.2:1. This means more “bang” from every spark, as well as better efficiency and power.
The new XTO OS™ propellers for boats and yachts are made to complement the torque potential of the Yamaha V8 XTO Offshore. These new propellers produce more thrust in both forward and reverse, using diameters from 16 to 17⅛ inches. The increased blade surface area is designed for moving big boats and yachts.
The In-Bank™ Exhaust feature means intake tracks enter the cylinder head from outside of the powerhead, allowing space for exhaust gases to have a direct route to the lower unit and out the propeller hub, improving flow.
Extreme Toughness and Reliability
In addition to an oversized gearcase, hardened gears, a robust, offshore bracket and motor mounts, the V8 XTO Offshore outboard also features proven plasma fusion technology for durability and lighter weight. The outboard also has a two-stage water pump and dual chamber oil pump, each designed to respond to the heavy loads associated with high RPM operation.
Dual overhead, endurance-driven camshafts on each cylinder bank are connected via a self-tensioning chain immersed in an oil bath for accurate valve timing and long life, delivering quiet and precise connection for proper and consistent valve timing. One sprocket belt engagement means a narrower, more compact overall profile.
Carbon-coated shimless bucket-type valve lifters also increase durability, while a dual-chamber oil pump ensures proper oil flow and delivery at every engine speed.
Plasma fusion replaces conventional steel cylinder liners. The micro-textured surface is 60 percent harder than steel and significantly lighter, contributing to increased displacement without increasing the size of the powerhead. The resulting surface also increases fuel economy by decreasing internal friction.
Spark plugs made from iridium, one of the rarest elements on earth and the second hardest, yield improved throttle response, economy, increased service life and improved power. The new V8 XTO Offshore outboard also features quad thermostats, two thermostats per cylinder bank, for improved flow and better regulation of engine and oil temperature.
A uniquely designed two-stage water pump features a massive rubber water impeller for high pressure and flow. A steel impeller helps provide sufficient water volume even under the most extreme offshore conditions. This configuration provides proper cooling water flow at all RPM and improved temperature control.
Extreme System Integration
The V8 XTO Offshore has integrated electric steering, the first of its kind in any outboard. The integrated steering system has no hydraulic lines or linkages, and responds more quickly than conventional systems to steering inputs. In addition, integrated electric steering means reduced power consumption, clean rigging, and a very orderly bilge area.
The new V8 XTO Offshore outboard also features an Integral Electronic Steering Control Unit that receives signals from the steering cylinder position sensor to carry out joystick and steering operation. Functions integrated into the electric steering system on Yamaha V8 XTO Offshore outboards include: joystick calibration, lever sensor, toe-in/out adjust, joystick thrust, lock to lock, and steering friction set.
Helm Master® and the CL7™ Display have also been updated along with the launch of the new XTO Offshore outboard.
Extreme Convenience, Control and Customer Care
Thanks to an ingenious new exhaust-gas relief system, V8 XTO Offshore propellers bite clean water in reverse, which helps yield reverse thrust up to 300 percent of that developed by Yamaha’s F350. That means easy maneuvering and more control in docking, particularly when the V8 XTO Offshore is matched with Yamaha’s Fully Integrated Boat Control System, Helm Master®.
Boats powered by the V8 XTO Offshore need go no further than the dock for a lower unit service, thanks to a unique gearcase lubricant exchange system that allows fluid change in the water. In addition, the V8 XTO Offshore also has great charging capabilities, providing up to 90 amps of total (gross) power and reaches peak net output around 1,500 RPM where it is needed most.
Backed by the best-trained dealer network in the industry and a five-year limited warranty for pleasure use, the V8 XTO Offshore also has the functionality to facilitate a comprehensive maintenance tracking tool.
All of these benefits—coupled with Yamaha’s reputation for great resale value—assure Yamaha V8 XTO Offshore owners will have an experience second to none.
Yamaha Marine products are marketed throughout the United States and around the world. Yamaha Marine Group, based in Kennesaw, Ga., supports its 2,000 U.S. dealers and boat builders with marketing, training and parts for Yamaha’s full line of products and strives to be the industry leader in reliability, technology and customer service. Yamaha Marine is the only outboard brand to have earned NMMA®’s Customer Satisfaction Index (C.S.I.) Award every year since its inception. Visit YamahaOutboards.com.
V8 5.6L 425 hp
The XTO Offshore® is the result of years of collaboration with top boat designers, and has been built from the ground up to provide the ultimate in power and efficiency offshore. With impressive stats such as the highest compression ratio on the water, industry firsts such as an electric steering system, and engineering touches such as iridium spark plugs and quad thermostats, it’s purpose-built for extreme power, durability, control and reliability.
North America is the key market for outboard motors worldwide, and sales of large outboard motors there continue to be healthy. A reason given for this is the focus on outboard motors in recent years as propulsion for large boats of 30 feet and over, instead of the previous mainstream of inboard and stern drive motors. Outboard motors offer the advantages in terms of speed performance, fuel economy, easier maintenance, and liberating boat interior space.
Building on this market trend, the F/FL425A was developed as propulsion for large offshore boats which provide safe and enjoyable fishing and cruising by quickly reaching waters further offshore.
As well as delivering the reliability and durability for which Yamaha has a well-established reputation, the F/FL425A features a wide range of new technology. For example, the combination of the ingenious new exhaust-gas relief system and specially-developed propellers provide excellent torque not only in regular travel, but also in reverse thrust. In addition, a key theme for the Yamaha Motor marine business in recent years is “becoming an integrated system supplier.” As a concrete expression of this initiative, Yamaha has developed the new Integrated Electric Steering System for the F/FL425A, eliminating the need for cables or hydraulic lines.Apart from the first introduction of electric steering, which provides quicker response to steering inputs, this system also features the Helm Master® joystick control interface and CL7 7-inch color touchscreen, together providing high operational convenience.
Available in signature Yamaha gray or new pearlescent white
425 hp on less-expensive 89-octane gasoline
Available with Helm Master® with SetPoint™
Impressive 5-year Limited Warranty, for pleasure use
Yamaha 3.3 Liter
4-Stroke V6 Outboard Motor
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||V8 / DOHC / 32 valves / 4 Valves per Cylinder
|Bore x Stroke
||96 x 96 mm (3.78 x 3.78 in)
|Prop Shaft Horsepower
||425hp at 5500 RPM
|Full Throttle RPM Range
||5000 - 6000 RPM
|Alternator Output at W.O.T.
||90 Amp Gross, Max
|Fuel Induction System
||Direct Injection / Up to 2900 PSI
||432 kg (952 lbs) / 443 kg (977 lbs) / 453 kg (999 lbs)
|Recommended Engine Oil
||Yamalube® 4M (See owner's manual)
|Recommended Fuel Filtration
||Yamaha 10-Micron Fuel / Water Separating Filter (external)
||Through Propeller (Except in Reverse Under 2500 RPM)
||ILMAR7E-9 / Iridium
||90 Amps Gross, Max
||Electric w/ PTT
|Engine Oil Capacity
||7.8L / 8.2 Quarts | 7.5L / 7.9 Quarts
|Ethanol Blend Limit
||Forward, Neutral, Reverse
||25" - 30" - 35"
|Degree of Tilt
||-4° through +73°
|Degree of Trim
||-4° through +16°
||Integrated, Electric Actuation
|Steering Angle (maximum)
||31° from center, either direction
||Limited 5-Year Pleasure, 3-Year Government, 1-Year Commercial