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OutBoard Engine 140 HP-4 Stroke Suzuki DF140A

The Suzuki DF140A is light and compact while providing exceptional performance, easily giving this motor the best power-to-weight ratio in its class.. An engine cover design features a large air induction port to provide maximum airflow and thus, maximum power.

Features:

  • Multi Point Sequential Electronic Fuel Injection

  • Suzuki Lean Burn Control System

  • Two-Stage Gear Reduction System

  • Offset Driveshaft

  • Over-Rev. Limiter

  • Low Oil Pressure Caution

  • Fully Transistorized Ignition

  • Timing Chain

  • Fresh Water Flushing System

  • Power Trim and Tilt

  • Tilt Limit

  • Speedometer Pickup of Gear Case

  • Suzuki Anti-Corrosion System

Introduction

If an engine with performance is an essential part of your boating life, then you need our combination of quality, reliability and choice. The Suzuki DF140A is light and compact while providing exceptional performance, easily giving this motor the best power-to-weight ratio in its class. An engine cover design features a large air induction port to provide maximum airflow and thus, maximum power. It’s also the first 4-stroke to utilize an oil cooler, ensuring that all that horsepower is available under every condition. Added up, the DF140A provides heavy-duty performance and long-lasting durability in a lightweight package.

The Suzuki DF140A is light and compact while providing exceptional performance, easily giving this motor the best power-to-weight ratio in its class. An engine cover design features a large air induction port to provide maximum airflow and thus, maximum power. It's also the first 4-stroke to utilize an oil cooler, ensuring that all that horsepower is available under every condition. Added up, the DF140A provides heavy-duty performance and long-lasting durability in a lightweight package.

 

Enjoy Your Holiday with Suzuki DF140A



Features:

Maximizing Fuel Economy and Performance

With the launch of the new generation DF140A our engineers have delivered a trio of outboards that offer great fuel economy without sacrificing on performance. This has been achieved by employing our advanced Lean Burn Fuel Control System

Transferring Power Into Speed

Our in-line four cylinder outboards utilize aggressive gear ratios that enable these outboards to swing a larger prop. The combination of a large prop and lower gear ratio delivers plenty of torque, exhilarating acceleration and exciting top-end speed.

All Torque

With acceleration and manoeuvrability high on the list of priorities it is no surprise that the DF140, with its excellent power to weight ratio, was one of the models selected for use at the London 2012 Olympic & Paralympic Games Sailing Regatta









Innovative Technology

The DF140A include an O2 Sensor Feedback System that helps to keep emissions cleaner and more stable. In addition to this the DF140A  also benefit form a knock sensor that detects and controls abnormal combustion allowing the engine to operate at optimum performance.

Cleaner, More Efficient Operation

Suzuki utilizes a number of its advanced technologies to deliver cleaner, more efficient operation that conforms to the Recreational Craft Directive (RCD) – Directive 2003/44EC of the European Parliament and of the Council, and has received three-star ratings from the California Air Resources Board (CARB).


Technology

Powerful

 

 Fuel Efficient 


Reliable

 

Innovative

   




Maximizing Fuel Economy, Maximizing Performance

Recognizing a need for more fuel-efficient outboards, Suzuki developed and introduced its innovative Suzuki Lean Burn Control System on the DF90A/80A/70A outboards, which received great acclaim from boaters and the media alike. The system predicts fuel needs according to operating conditions allowing the engine to run on a more efficient fuel mixture through the use of a lean air to fuel ratio. Its benefits are delivered over a wide operating range providing significant improvements in fuel economy from low-speed operation up into the cruising range. In-house testing shows that while cruising, the DF140A is 14% more economical than its predecessor without sacrificing any of the original DF140's power.





 




DOHC 4-Valve Engine

Suzuki has a long history of designing and manufacturing engines for motorcycle, automobile, and marine use. Drawing upon this unrivaled experience Suzuki engineers have designed an in-line four cylinder engine that delivers high power output, high performance, excellent fuel economy, and efficient operation. With a displacement of 2,044cm3, the in-line four-cylinder block is topped with a high performance 16-valve, dual overhead cam (DOHC) powerhead.

Obtaining Maximum Performance

The DF140A utilize an enhanced air intake system that maximizes airflow into the engine to obtain greater power output. In order for this system to achieve full potential, greater exhaust efficiency is required as well, so the engines are designed with an efficient "4 into 2 into 1" exhaust system that reduces drag in the exhaust letting it flow smoothly out of the cylinders. This design increases low to mid-range torque on these outboards and provides the wide powerband that boaters want.

The DF140A also feature a two-stage reduction gear that delivers the torque needed to turn a large diameter propeller. This is normally done using larger gears or a larger gearbox, but Suzuki has long employed a two-stage system that provides the required torque without adding unwanted bulk or weight to the engine. With a final drive ratio of 2.59, these outboards produce plenty of torque for quick acceleration.

Both models also feature a two-stage reduction gear that delivers a larger gear ratio of 2.59. On the drive shaft, the first stage reduction delivers a ratio of 1.24 while the second stage, in the gear case itself, delivers a further reduction of 2.08. The biggest gain this system delivers is in its capability to use a highly efficient, large pitch, large diameter propeller.





O2 Sensor Feedback Control System

Like Suzuki's flagship DF300AP, the DF140A feature an O2 Sensor Feedback Control system that keeps emissions cleaner and more stable. By controlling the air to fuel ratio across each of the engine's operating ranges, the system provides an optimum amount of fuel to the engine regardless of rpm.

Knock Sensor (DF140A/115A)

The DF140A  is Suzuki's first four-cylinder outboards featuring a knock sensor. Found on some V6 models, this system is used to detect and control abnormal combustion allowing the engine to operate at optimum performance. The system increases engine durability and helps deliver maximum power.

Multi-Point Sequential Electronic Fuel Injection

The system uses a 32-bit computer in the electronic control unit to monitor vital operating data gathered from a series of sensors located in critical areas on the engine. Processing this data in real time, the system automatically calculates the optimum amount and exact timing of fuel to be injected at high pressure into the combustion chamber. Benefits include smoother and faster acceleration, crisp throttle response, maximum fuel economy, low emissions, and quick, reliable starts.

Suzuki Water Detecting System

Water in the fuel can lead to problems that include poor combustion, lower power output, and corrosion. The Suzuki Water Detecting System is designed to help protect the engine from moisture in the fuel utilizing a water detecting fuel filter to alert the operator with both visual and audio warnings when water is present in the fuel. The filter also designed to let you check for water visually.



 

 Suzuki Troll Mode System (Optional)

The Suzuki Troll Mode System is optionally available on all three outboards. This system provides finer control over engine speed at low rpms keeping the boat moving at a steady speed while trolling. When the system is engaged, engine speed is controlled with an independent control switch that adjusts engine revs in 50rpm increments over a range that spans from idle to 1,200rpm. In addition to the control switch, which can be mounted nearly anywhere on the console, the system includes a tachometer and is compatible with Suzuki's SMIS digital gauges or the dual scale analog gauges.

Multi Function Tiller Handle (Optional)

Available on the DF115A and DF100A only, Suzuki's Multi-Function Tiller handle is ergonomically designed using computer modeling to simulate the operator's body, arm, and eye movements to optimize placement of the shift lever, switches, and indicator and provide easier, more comfortable control of the outboard. The shift lever is also ergonomically designed to provide a comfortable feel whether it's operated with the left or right hand. The power trim and tilt switch is located on the handle grip allowing simultaneous operation of the throttle and trim and the handle also incorporates a Suzuki Troll Mode System switch.



Specifications

MODEL
DF140A *3
RECOMMENDED TRANSOM HEIGHT mm
L: 508, X: 635
STARTING SYSTEM
Electric
WEIGHT kg *1
L: 179, X: 184
ENGINE TYPE
DOHC 16-Valve
FUEL DELIVERY SYSTEM
Multi-Point Sequential Electronic Fuel Injection
NO. OF CYLINDERS
4
PISTON DISPLACEMENT cm3
2,044
BORE ×STROKE mm
86 x 88
MAXIMUM OUTPUT kW
103.0
FULL THROTTLE OPERATING RANGE rpm
5,600-6,200
STEERING
Remote
OIL PAN CAPACITY Lit.
5.5
IGNITION SYSTEM
Fully-transistorized
ALTERNATOR
12V 40A
ENGINE MOUNTING
Shear Mount
TRIM METHOD
Power Trim and Tilt
GEAR RATIO
2.59:1
GEAR SHIFT
F-N-R
EXHAUST
Through Prop Hub Exhaust
PROPELLER SELECTION
(Pitch)*2
All propellers are the 3-blade type
15"-25"