SUZUKI MARINE LAUNCHES INDUSTRY’S FIRST 300HP V6 4-STROKE OUTBOARD
January 28, 2007
Suzuki Marine’s new-for-2007 DF300 proves that the most powerful 4-stroke outboard in the world can also be lightweight, compact and streamlined — making it the ideal power choice for an increasingly popular class of saltwater heavy hitters — bluewater center consoles, offshore
tournament boats, express cruisers and power catamarans.
This 300-horsepower outboard is the highest output production engine Suzuki Motor Corporation has produced. At 4.0 liters, this new engine offers the largest displacement of any V6 outboard ever made. The low-end grunt and torque to power heavily loaded offshore boats out of the hole is second to none. And the silky smooth acceleration keeps on climbing as you push the new electronic shift/throttle forward, right up until the boat
reaches its eye-watering top end speeds.
Suzuki’s DF300 delivers all this power and performance in a package that fits with today’s modern fishing and performance boats. With a target weight of 604 pounds for the X 25” shaft model (or 615 pounds in XX 30” shaft), Suzuki’s 300-horsepower 4-stroke weighs about the same as other normally aspirated 250-horsepower models — and considerably less than any supercharged 4-stroke 200 horsepower and up. And thanks to weight-saving features like new Alumite-coated forged aluminum pistons, which are attached to connecting rods with full float hollow wrist pins. Suzuki tips the scales in its favor despite boasting considerably more displacement than the competition.
“Companies are designing and building outboard powered boats larger, heavier and more seaworthy than ever,” said Suzuki Marine Marketing Director Larry Vandiver. “Load boats like these with a couple hundred gallons of fuel, bait, chum, ice, tackle and a whole team of anglers, and it takes some serious torque and power to push them. Our engineers know that when it comes to performance and long-term durability in real world conditions —
there truly is no replacement for displacement.”
High displacement, high-horsepower motors such as Suzuki’s new DF300 are redefining the public’s concept of outboard powered boats. “When you take into consideration the savings in weight and cockpit space, ease of maintenance and the fuel efficiency of 4-stroke outboards, they make a very attractive alternative to traditional diesel or gasoline inboard engines on larger fishing and cruising boats,” added Vandiver.
The DF300 was designed with a narrow 55-degree V block. This narrow design allows for easy mounting of twin or triple installations on 26-inch centers without contact. Suzuki also uses its reliable offset driveshaft on the DF300, for better balance on the transom and an overall compact design. For unsurpassed performance and fuel efficiency, Suzuki’s DF300 features a Dual Overhead Cam (DOHC) powerhead with four valves per cylinder. Suzuki’s proven Variable Valve Timing continually adjusts the intake cam phasing to maximize torque in the low- and mid-range. This feature also reduces emissions and improves fuel economy, a big plus for offshore tournament anglers who like to run fast and far in search of fish. Suzuki’s clean-running DF300 has met the Environmental Protection Agency (EPA) 2006 Federal emission standard and the California Air Resources Board (CARB) 3 - Star Ultra Low Emissions rating.
This breakthrough new outboard boasts other design features popularized on other advanced Suzuki 4-strokes, including computer controlled multi-point electronic fuel injection for optimum performance and a self-adjusting, oil bathed timing chain.
The DF300 also introduces several important firsts for Suzuki Marine, beginning with a sleek, aggressively designed new lower unit that reduces drag by 18 percent. This hydrodynamic lower unit works in conjunction with Suzuki’s proven two-stage gear reduction for an aggressive final drive ratio of 2.08:1. This low gear ratio means the DF300 can easily swing a 16-inch stainless steel propeller from 17- to 26-inch pitch, for optimum performance on wide a variety of hull shapes and styles. Counter rotation is available in both 25” and 30” shaft lengths for twin/triple engine configurations.
Newly configured air inlets are 25-percent larger than those on the Suzuki DF250 and feed an 81mm single throttle body for increased induction airflow. In another first, exhaust now flows unimpeded through the engine’s mid-section, as cooling water is routed through a separate track and expelled through a special vent above the propeller. These new intake and exhaust systems work together to improve the engine’s overall breathing for increased power output. And with a maximum operating range of 5,700 to 6,300 rpm, boaters can wind the DF300 up for exhilarating top-end performance.
Suzuki engineers know how important a full arsenal of sophisticated electronics is to today’s modern fisherman, so they’ve included a powerful 12V 54 Amp alternator that delivers plenty of juice to power up fishfinders, GPS chart plotters, radar systems, baitwell pumps, spreader lights and more. The DF300 also features a dual circuit charging system that can be adapted to accommodate the dual-battery configurations often used on large boats. The system is designed to charge both the cranking and house batteries simultaneously but on independent circuits. Boaters can drain their house battery running trolling motors, electronics or pumps and still have a fully charged cranking battery for starting the outboard motor.
The new DF300 is the first Suzuki to feature Suzuki Precision Control™— an advanced fly-by-wire shift/throttle system specifically designed for single or dual helm installation, with either single, twin or triple engine rigging. This new electronic control provides many performance advantages over traditional cable-driven systems, including smoother, more decisive shifting and quicker throttle response — especially important when maneuvering in and out of tight spaces.
Suzuki Precision Control also provides easy electronic synchronization of twin or triple engines for maximum engine efficiency while underway. There’s another important feature of this new Suzuki outboard. When it hits dealerships this fall as a 2007 model, it will be readily available for both new boats and repowers. “Unlike some competitors, you won’t have to buy a new boat to get the best, most powerful 4-stroke outboard on the market,” said Vandiver. “Suzuki’s new electronic shift/throttle system makes it easy to upgrade an existing boat with the most advanced, strongest running
outboard on the water,” added Vandiver.
Additional features that make Suzuki’s new DF300 easy to use and maintain include push-button starting, new easy-to-use cowling latches and front and rear freshwater flushing ports, so you can keep the inside as clean as the outside.
Like every Suzuki 4-stroke outboard, the new DF300 is backed by Suzuki’s three-year limited warranty, with an available three-year Extended Protection Plan that provides a total of six years of protection. For more information about this breakthrough new outboard or Suzuki’s industry-leading line of 4-strokes from 2.5 to 300 horsepower, contact Suzuki Marine, 3251 E. Imperial Highway, Dept. P, Brea, CA 92821 • (714) 996-7040 Or visit www.suzuki.com.
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