Description
Petrol engine SUZUKI DF350ATX EFI
Petrol engine SUZUKI DF350ATX EFI
New 4390 ccm V6 engine block with compression ratio 12:1 equipped with two fuel injectors per cylinder, self-adjusting chain, air intake manifold with “Direct Intake” technology and VVT (Variable Valve Timing) system. An innovative reducer with two counter-rotating propellers has been developed for the SUZUKI DF350A boat engine. Despite the impressive working volume and power output, thanks to the Suzuki Lean Burn Control system, the fuel consumption pleasantly surprises! The V6 configuration of the engine unit provides quiet and smooth operation throughout the rev range, the bet reduction with two counter-rotating propellers provides unmatched dynamics and traction. S.P.C. Suzuki Precision Control ensures smooth shifting and precise throttle control, provides impressive comfort and at the same time preserves fuel economy.
Suzuki introduces the new 4-stroke Suzuki 350 Zs engine – Suzuki DF350A V6
The new flagship presents the innovative combined rotation propellers, they are two, each rotating in the opposite direction.
350 horsepower and a 12.0:1 cylinder compression ratio
Engineers have achieved 350 horsepower while keeping the Suzuki outboard still compact and light. The working volume of the powerful engine from 4.4 liters will be supplemented with a high compression ratio of 12.0: 1, it will be the highest in the production of outboard engines. A unique cool air intake system, dual fuel injectors and reinforced pistons make the engine quieter and eliminate engine noise, a typical byproduct of high compression engines.
Suzuki Dual air intake (Dual Louver)
and direct air intake systems
Suzuki engineers have created an air intake system that provides the power unit with plenty of fresh air while separating water, splashes and moisture. Dual vents under the hood stop larger water droplets and moisture from entering the hood, so there was zero water at the air intake during testing. In addition, the intake air temperature is on average 10 ° degrees cooler than the ambient air temperature, which provides cooler air to the combustion chamber, increasing engine power.
Dual fuel injection nozzles
Two smaller fuel nozzles inject fuel precisely into the center of the combustion chamber, which prevents fuel from burning on the side of the combustion chamber, where this imprecise combustion can be the main cause of engine noise. In addition, if 100% of the fuel is injected into the cylinder at once, some cooling is achieved, gaining up to 3% additional power and reducing engine detonation noise.
New pistons and their preparation technology
To reach 350 horsepower, the piston surfaces must be additionally prepared to withstand the additional forces. To ensure both performance and longevity, Suzuki engineers changed the standard heat treatment to “shot peening”. beautiful fresh pits in contact with the pistons, which would evenly equalize the pressure during combustion. In addition, the connecting rods, crankshaft and other engine components are also reinforced to withstand the additional load.
Suzuki Twin Propeller System
Combined rotation propellers have not been a new technology, nor have they ever been successful in the outboard motor segment, but they were until now… The new DF350A has two propellers (twins) providing three main benefits, compact size, more stability and more “thrust.”
The power of the engine is transferred to a six-bladed propeller instead of just three, this allows to reduce the size of the reducer housing, the size of the gears to a minimum, which in turn made it possible to design a slimmer and more hydrodynamic reducer housing. Suzuki engineers devoted many hours to computer simulations and on-water tests, knowing that reducing gearbox vibration and drag underwater was essential to improving the overall speed and performance of the powerboat.
Combined rotary propellers also provide additional propeller blade area, increasing stability and increasing ‘thrust’ and ‘grip’ on the water. (Similar to a wider-sized car tire compared to a normal tire.) This results in excellent acceleration (eliminating steering resistance), better-than-expected top speed and incredibly good reverse. More importantly, these improvements are even with heavier boats with a full tank of fuel, equipment and people.
Suzuki technologies
The DF350A features Suzuki Precision Control, Drive-by-wire shifter and throttle lever (engine control via electrical cables instead of mechanical cables). Boat drivers will appreciate the smooth shifting when moving the throttle control lever, not to mention the easier engine installation and connection of a second control station.
Like other Suzuki V6 outboard engines, the new DF350A is equipped with an Offset crankshaft, reducing engine dimensions and providing a two-stage gear reduction, which further provides a higher reduction ratio of 2.29 : 1) with more torque and greater acceleration.
The new engines are more compact and will take up less space on the motorboat trench if you want to install more than one boat engine.
The new DF350A also uses Suzuki’s Lean Burn fuel control technologies to improve fuel economy throughout the rev range, and especially at cruising speed. Like all Suzuki 4-stroke engines, the DF350A is very quiet at idle.
As you can see, in creating this new engine, Suzuki is not only bringing horsepower to the market, but also innovation, ease of use and comfort. While maintaining the importance of power and speed, a lot of thought and work goes into engine size, fuel economy, reliability and stability, making the New Suzuki DF350A the Ultimate 4-stroke outboard!
Leg length X: 25″ / 638mm XX: 30″ / 762mm
Starting the engine Electric starter
Engine type V6 – 55 degree DOHC 24-Valve
Engine Weight X: 727 lbs / 330 kg XX: 747 lbs / 339 kg
Camshaft drive Chains with Variable valve opening stroke.
Fuel supply system Electronic fuel injection
Number of cylinders 6
Working volume 267.9 cu.in / 4.390 liters
Piston diameter x stroke 3.74″ x 3.82″ / 98mm x 97mm
Maximum power 350 hp / 257.4 kW
Maximum revolutions 5,700 – 6,300 rpm
Control Distances
Oil sump volume 8.0 liters
Ignition System Completely Transistor
Alternator 12V 54A
Installation of the engine Installation on board
Engine lift Hydraulic
Gear ratio 2.29:1
Shifting gears F-N-R (Control by wire)
Outgassing Through the propeller
Propeller variants Front: 3 x 15.5 x 19.5 – 31.5
(All propellers are 3-blade) Rear: 3 x 15.5 x 19.5 – 31.5
