Power with Passion

DF300B OUTBOARD

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Disclaimer

*‘Sail Away’ on 2.5 to 30hp tiller-controlled models the price includes dealer pre-delivery charges. Tiller models 40HP and above excludes pre-delivery costs.

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The Ultimate Choice

We are extremely proud of what we have achieved with the DF300B – an outboard that perfectly balances awesome power and thrust, with outstanding fuel-efficiency and trusted reliability all in a lightweight and stylish design.

Built for every-day use of larger boats, this market-leading new outboard has been engineered to run on 91 RON fuel and, is the world's first four stroke outboard of 300 horsepower with a dual propeller. This high-tech and innovative DF300B has been designed to be robust, easy to use and versatile, making it the ideal outboard for large boats whatever the task.

Whether you are using your boat for work or for leisure, wherever you are in the world, this new outboard is the ultimate choice.

Discover Suzuki's 3+3 year Warranty for recreational used outboards, plus other terms and conditions for commercial and government registered outboards under Suzuki's Warranty Policy.

Gallery

GEKI: Parting Seas

A Force to Match the Power of Nature and the Sea
Representing Suzuki’s Identity and Heritage
A Symbol of Our Passion and Commitment
to the Ultimate in Marine Innovation

Combining Huge Power and Maximum Efficiency

Our engineers set out to build a compact, lightweight outboard that combines the high power required, alongside the operating efficiencies that cannot be achieved by using technologies such as turbocharging or supercharging. Additionally, they set the goal of making the DF300B run on low octane, 91 RON fuel, which combined with legendary Suzuki reliability makes the outboard ideally suited for a wide variety of large boats around the world.

The traditional single propeller design creates forward thrust, but also produces a significant amount of rotational energy. Our engineers have captured this wasted energy and turned it into productive power by utilising our revolutionary dual-propeller technology. They have solved the problem of the disruption of the water flow, caused by the larger gear case, typically needed by higher power engines. Years of research and innovation have gone into developing the technologies that significantly improve the way an outboard converts engine power into underwater thrust. The result is a revolution in innovation. We call it ‘GEKI’.

3 + 3 years Recreational Warranty

All recreational/privately registered Suzuki Outboards come standard with 3-years / unlimited hours manufacturer’s warranty. Recreational outboards are also eligible for a bonus 3-year Warranty providing that an authorised Suzuki Marine Dealership completes servicing as per the owners manual schedule. The Suzuki dealer must use only genuine parts and oils during both manufacturer’s and bonus warranty periods.

Features

Development of Suzuki's first Contra-rotating Propeller

Our engineers know that the shape of the lower unit and the design of the propeller have a critical impact on performance. The innovative contra-rotating propeller design provides more grip underwater, and because contra-rotating propellers distribute the engine's torque evenly over two propellers, the torque per propeller decreases and gear diameter can be reduced. A reduction in gear diameter has allowed the design of a smaller, and far more hydrodynamic gear case.

Advanced Gear Case Design

At high speeds cavitation can cause significant losses in speed and grip. The New DF300B overcomes this with a highly advanced gear case design. Computational fluid dynamics (CFD) and countless test drives, have resulted in a breakthrough design that not only minimises resistance but also provides a highly efficient flow of water to the propellers.

Propeller Blade Design

A new three-blade/three-blade propeller set up has been developed that provides incredible acceleration and increased performance. In testing, this configuration recorded the highest speeds, even under heavy load and at high rotation speeds. The propeller blade geometry has also been optimised to work in the configuration resulting in incredible grip and acceleration across the range. An added benefit is exceptional stability, achieved because each propeller rotates in a different direction, balancing the turn.

High Reverse Thrust

With six blades rotating, the contra-rotating propeller produces a strong reverse thrust. The materials of the new DF300B gears are ultra-strong to withstand high loads and feature special heat treatment to give additional strength and reliability.

Unrivalled Big-Block Fuel Economy & Reliability

The ultimate Suzuki outboard is always aiming to be lighter and more powerful. The new DF300B features our proven 4.4 litre displacement block giving tremendous torque and making it the largest displacement V6 on the market today. Plus, with a compression ratio of 10.5:1 the DF300B also delivers impressive fuel economy and reliability.

Direct Intake System and Dual Louver System

Achieving a flow of cooler, drier air directly into the engine is made possible by the unique combination of the Direct Intake System and the Dual Louver System. This revolutionary approach ensures a direct flow of air whilst eliminating water intake, even in the face of the most severe on-water testing. The Dual Louver System incorporates a double shield of blades, each one designed in a dog-leg shape. This system helps remove water from the air and prevents water to be taken into the cowl. As a result, intake air is free of moisture and kept close to ambient temperature.

Dual Injectors

Injecting fuel achieves two things, it atomises the fuel and it cools the cylinder. To provide the power and cooling needed, the fuel must be completely injected at precisely the right time and angle. The all new Dual Injector System uses two smaller injectors giving immense precision, improved atomisation and increased fuel efficiency.

Dual Water Inlet

Dual water inlet is a technology developed to cool the engine with minimal friction loss, using a combination of a small water pump and dynamic water pressure. Conventional outboards have water inlets on the side of the strut of the gear case. However, at very high speed, the water pressure at the strut surface is reduced, making it difficult to maintain stable water suction. The DF300B has water inlets on the tip of the gear case, which helps with water suction even when there is dynamic pressure caused by the movement of the gear case through the water.

Lean Burn

Our innovative Lean Burn Control System was first introduced on the DF90A/80A/70A to great acclaim. The system predicts fuel needs according to operating conditions, allowing the engine to run on a leaner, more efficient air-fuel ratio. It delivers its benefits over a wide operating range, providing significant improvements in fuel economy from low-speed operation into the cruising range. In combination with Suzuki Precision Control electronic throttle and shift system, the operator can precisely, and smoothly, increase or decrease engine RPM for significantly improved fuel economy.

2-Stage Gear Reduction

The DF300B outboard also incorporates a 2-Stage Gear Reduction which results in a large reduction gear ratio. It delivers powerful torque for quick acceleration and great top-end speed.

Offset Driveshaft

Suzuki outboards are among the most compact outboards in their respective classes.
That’s due in part to our proven offset driveshaft system. This design places the crankshaft in front of the driveshaft through the use of intermediate gear reduction. In addition to providing an increase in power performance and adding to the compactness of the outboard, this system moves the outboard’s centre of gravity forward, resulting in better weight distribution and balance, better directional stability, and less vibration.

Advanced Variable Valve Timing System

Our engineers designed the 4.4-litre V6 engine with an aggressive cam profile that delivers maximum output and performance at high rpm. In coupling this cam profile with our advanced Variable Valve Timing (VVT), the DF300B delivers the additional torque that outboards need for accelerating in the low to midrange. VVT achieves this by adjusting the timing of the intake valves, allowing them to open before the exhaust valves are fully closed, creating a momentary overlap in the timing where both sets of valves are open. Using VVT, this overlap can be increased or decreased by altering intake timing with the camshaft resulting in optimum timing for low and mid-range operation.

Precision Control

This technologically advanced system is a computer-based drive-by-wire control system that eliminates the friction and resistance of mechanical control cables. Operation is smooth and precise with crisp, immediate shifting that is most evident in the low rpm range and when manoeuvring around the marina and in close quarters. The system is configurable for single, twin, triple, or quad installations, and for dual stations.

Suzuki Troll Mode System

Suzuki’s Trolling Mode system provides finer control over engine speed at low rpms to keep your boat moving at a constant speed while trolling. When the system is engaged, revs are controlled with an independent control switch that adjusts engine revs in 50rpm increments over a range spanning from idle to 1,200rpm. The system includes a control switch, which can be mounted nearly anywhere on the console, and a tachometer, and is compatible with Suzuki’s SMIS digital gauges or the dual scale analogue gauges.

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Specifications

Starting system	Electric
Engine Type	V6 (55°) 4-stroke
Fuel Delivery System	Electronic Fuel Injection
Bore X Stroke	98 x 97mm
Full Throttle Operating Range	5,300 - 6,300rpm
Oil Pan Capacity	8.0L
Fuel Tank Capacity (L)	-
Trim Method	Power Trim and Tilt
Gear Shift	F-N-R
Propeller Selection (Pitch)	12" - 31.5"

Weight	X: 330kg, XX: 339kg
Valve Train	DOHC 24-Valve
Displacement	4,390cm³
Maximum Output	220.7kW
Control System	Digital (Drive-by-wire)
Recommended Fuel	RON91 / AKI87
Alternator	12V 54A
Gear Ratio	2.29 : 1 (Two-stage gear reduction)
Exhaust	Through Prop Hub Exhaust

Performance

Conclusion

Noosa Cat 3100

Optimal Cruise Speed

4000 rpm @ 0.57 KM PER LITRE
Cruise Range (Approx)

454.96km (245NM)km
Maximum Speed

46 Knots or 85.2km/h
0-40km/h

4 Seconds

Noosa Cat 3100

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Download Pdf

Noosa Cat 3100

Test conditions

Date

2022-09-28
Crew

4 People onboard
Location

Noosa Qld
Temperature

25°C
Condition

Calm

DF300B OUTBOARD tested on Noosa Cat 3100

Noosa Cat 3100

Hull Type

Catamaran
Material

GRP
Length

8.97m
Beam

2.85M
Dry Weight

3859kg
Max Horsepower

600hp
Fuel Capacity

800L
Weight as tested

5150kg
Steering Type

Digital Electric

DF300B

Horsepower

300hp
Cylinder

V6
Mounting hole position
Weight

338kg
Gear Ratio

2.29:1
Propeller

Watergrip Stainless steel
Number of Engines

2

Conclusion

Optimal Cruise Speed

4000 rpm @ 0.57 KM PER LITRE
Cruise Range (Approx)

454.96km (245NM)km
Maximum Speed

46 Knots or 85.2km/h
0-40km/h

4 Seconds

Results on individual boats may vary due to many factors, including weather, tides, boat load, hull, lower unit & propeller conditions. Suzuki Australia P/L accepts no responsibility for the accuracy of these readings.

DF300B performance figures

Noosa Cat 3100

RPM

Av KM/H

L/Hr

Av L/KM
600

7.4

4.5

1.65
1000

11.1

5.2

2.14
1500

12

14.6

0.82
2000

14.8

19.5

0.76
2500

18.5

32

0.58
3000

27.8

51

0.54
3500

35.2

63.5

0.55
4000

42.6

74.9

0.57
4500

53.7

110

0.49
5000

64.8

149

0.44
5500

72.2

187

0.39
6000

81.5

219.8

0.37
6100

85.2

222.8

0.38

DF300B fuel consumption comparison

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Buy the DF300B OUTBOARD

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SUZUKI FINANCE

Getting out on the water couldn’t be simpler than with Suzuki Finance. Available exclusively through the accredited Suzuki marine dealership network, Suzuki Finance specialises in Marine finance products, offering a full suite of funding options available to suit your specific needs.

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SUZUKI INSURANCE

The Suzuki Boat Insurance policy is designed for passionate and enthusiastic pleasure craft owners. We recognise the special place your boat holds in your marine lifestyle and we aim to provide you with the peace of mind that you are covered if the unexpected happens.

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Power with Passion

DF300B OUTBOARD

Disclaimer

Disclaimer

The Ultimate Choice

Gallery

Gallery

GEKI: Parting Seas

Combining Huge Power and Maximum Efficiency

3 + 3 years Recreational Warranty

Features

Development of Suzuki's first Contra-rotating Propeller

Development of Suzuki's first Contra-rotating Propeller

Advanced Gear Case Design

Advanced Gear Case Design

Propeller Blade Design

Propeller Blade Design

High Reverse Thrust

High Reverse Thrust

Unrivalled Big-Block Fuel Economy & Reliability

Unrivalled Big-Block Fuel Economy & Reliability

Direct Intake System and Dual Louver System

Direct Intake System and Dual Louver System

Dual Injectors

Dual Injectors

Dual Water Inlet

Dual Water Inlet

Lean Burn

Lean Burn

2-Stage Gear Reduction

2-Stage Gear Reduction

Offset Driveshaft

Offset Driveshaft

Advanced Variable Valve Timing System

Advanced Variable Valve Timing System

Precision Control

Precision Control

Suzuki Troll Mode System

Suzuki Troll Mode System

Specifications

Performance

Conclusion

Noosa Cat 3100

Optimal Cruise Speed

Cruise Range (Approx)

Maximum Speed

0-40km/h

Noosa Cat 3100

DF300B OUTBOARD

Select Boat

Noosa Cat 3100

Test conditions

Date

Crew

Location

Temperature

Condition

DF300B OUTBOARD tested on Noosa Cat 3100

Noosa Cat 3100

Hull Type

Material

Length

Beam

Dry Weight

Max Horsepower

Fuel Capacity

Weight as tested

Steering Type

DF300B

Horsepower

Cylinder

Mounting hole position

Weight

Gear Ratio

Propeller

Number of Engines

Conclusion

Optimal Cruise Speed

Cruise Range (Approx)

Maximum Speed