DF140B / DF115B / DF100C

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

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

• 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

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 roughly equivalent to the necessary output of SMD12/SMD16.

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.