IN-LINE 4 140-70HP
DF140B / DF115B

DF140A/115A's Reliability & Fuel Efficiency + Cutting Edge Technology.


Easy Maintenance
- Easy access oil filter : Can be replaced simply by removing the top cover
- Oil Spill Catcher : A tray is added around the oil filter to catch oil which comes out when exchanging the oil filter
- Oil Level Gauge : Able to use Φ15 oil changer hose
High Durability
By optimizing the gear oil passage, the spinning pinion gear generates negative pressure and it helps gear oil circulation. It lowers gear oil temperature and contributes to the increased durability of pinion gear.
Lean Burn
Our Lean Burn intelligent fuel management system predicts fuel needs by monitoring engine performance and operating conditions to deliver a leaner fuel mixture to the engine. The result: remarkably improved fuel economy that the environment—and your wallet—will love.
- DURABILITY & RELIABILITY
-
*1 Available with SMG
- EASE & COMFORT
-
*2 Available with SMG or Troll Mode Switch Panel
DURABILITY & RELIABILITY
Newly Designed Air Intake System
- The air intake structure was reviewed
Advantage
- Delivers higher power output
- Increased ability to remove water from air taken into cowl
- Decrease in the air intake temperature

Direct Ignition
- Integrates the ignition coils into the spark plug caps
Advantage
- Reduces the number of parts and simplifies the wiring system
- Removing the high tension cord enables the ignition to generate spark efficiently which leads to the improvement of combustion efficiency

Water Detecting System
- It helps to protect the engine from water in the fuel
- Using bigger fuel filter than DF140A/115A
- Optimized Fuel Filter position
Advantage
- Can avoid water in fuel
- Increased Durability & Reliability
- Easy replacement of fuel filter

- Bigger Fuel Filter
More Features to contribute to Durability
- Large capacity Fuel Pump : Capable to rig on various kinds of boats
- Optimized O2 Sensor mounting position : Increased Durability
- Using Zinc-containing Rustproof Coating bolt : Increased Durability
PERFORMANCE
High Compression Ratio
- To achieve the optimized mask, port and piston combination, the shape of parts was simulated over 1,000 combinations and then tested thoroughly with the carefully selected parts.
Advantage
- Generates good combustion that makes better fuel efficiency compared with A model.
- Achieved 10.6 Compression Ratio which contributes to high torque.

Offset Drive Shaft
- The engine powerhead is positioned closer to the front, moving the outboard’s center of gravity forward.
Advantage
- Less vibration
- More compact
- Stable steering performance
2-Stage Gear Reduction
- This system which incorporates the Offset Driveshaft features a first stage reduction between the crankshaft and drive shaft, and a second stage reduction inside the gear case.
Advantage
- High Torque even with big loads.
- Powerful enough to rotate larger propeller
EASE & COMFORT
Quiet Operation
- Intake noise is suppressed with a resonator, which makes the noise from the outboard quieter.
Advantage
- Less noise, making boating more pleasant.

Alternator Output
- Newly designed ventilation which cools the coils better
Advantage
- 3Amp better alternator output at idle speed range that is good for boats that spend a lot of time trolling.

ECOLOGY & ECONOMY
Lean Burn Control System
- The Lean Burn Control System supplies the appropriate amount of fuel and air mixture depending on the navigation conditions.
Advantage
- Significant improvement in fuel economy in all speed ranges especially at cruising speed.
- Fuel is saved and gasoline costs are cut thanks to improved fuel economy.
MODEL | DF140B |
---|---|
RECOMMENDED TRANSOM HEIGHT mm | L:508, X:635 |
STARTING SYSTEM | Electric |
WEIGHT kg *1 | L: 186, X: 190 |
VALVE TRAIN | DOHC 16-Valve |
FUEL DELIVERY SYSTEM | Multi-Point Sequential Electric Fuel Injection |
NO. OF CYLINDERS | 4 |
PISTON DISPLACEMENT cm3 | 2,045 |
COMPRESSION RATIO | 10.6 |
BORE × STROKE mm | 86 x 88 |
MAXIMUM OUTPUT kW | 103 |
FULL THROTTLE OPERATING RANGE rpm | 5,700-6,300 |
STEERING | Remote |
OIL PAN CAPACITY Lit. | 5.5 |
RECOMMENDED FUEL | RON91 / AKI87 |
ALTERNATOR | 20A/700rpm , 40A/6000rpm |
ENGINE MOUNTING | Shear Mount |
TRIM METHOD | Power Trim and Tilt |
GEAR RATIO | 2.59:1 |
PROPELLER SELECTION (Pitch) | 15"-25"(RR), 17"-23"(CR) |
MODEL | DF115B |
---|---|
RECOMMENDED TRANSOM HEIGHT mm | L:508, X:635 |
STARTING SYSTEM | Electric |
WEIGHT kg *1 | L: 188, X: 192 |
VALVE TRAIN | DOHC 16-Valve |
FUEL DELIVERY SYSTEM | Multi-Point Sequential Electric Fuel Injection |
NO. OF CYLINDERS | 4 |
PISTON DISPLACEMENT cm3 | 2,045 |
COMPRESSION RATIO | 10.6 |
BORE × STROKE mm | 86 x 88 |
MAXIMUM OUTPUT kW | 84.6 |
FULL THROTTLE OPERATING RANGE rpm | 5,000-6,000 |
STEERING | Remote |
OIL PAN CAPACITY Lit. | 5.5 |
RECOMMENDED FUEL | RON91 / AKI87 |
ALTERNATOR | 20A/700rpm , 40A/6000rpm |
ENGINE MOUNTING | Shear Mount |
TRIM METHOD | Power Trim and Tilt |
GEAR RATIO | 2.59:1 |
PROPELLER SELECTION (Pitch) | 15"-25"(RR), 17"-23"(CR) |
The appearance, colors, and equipment of outboard
motors may differ according to market and grade.
Specifications may change without prior notice.
*Manufacture data
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