DF100B / DF90A / DF80A / DF70A

IN-LINE 4 140-70HP

Overview Technology Specifications

DF100B / DF90A / DF80A / DF70A

A new standard in four-strokes from Suzuki.

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Overwhelmingly Light, Lightest in Class

Compact

100ps from a DF90A engine body
Offset drive shaft for compact body

The Largest Reduction Gear Ratio

2.59:1, the greatest reduction gear ratio in XXkW (100ps). (SUZUKI internal reserch)

Full Equipment

Offset DriveshaftDF70A AND UP

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

Offset Driveshaft

2-STAGE GEAR REDUCTIONDF70A AND UP

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. This design makes a larger gear ratio possible, allowing it to turn a large diameter propeller.

Advantage

Increased power to turn large diameter propellers, offering quick acceleration.
High propulsive efficiency with large diameter propeller.
Powerful navigation, maintaining propeller rotation even with a larger load.

GEAR RATIO IN EACH CLASS

MODEL	DF140BG/115BG/ DF140A/115A/100A DF100B/90A/80A/70A DF90AWQH	DF200A(AP)/ 175A(AP)/150A(AP) DF150W	DF250/ 225/200	DF300AP/ 250AP DF250W	DF350A/ 325A/300B
GEAR RATIO	2.59:1	2.50:1	2.29:1	2.08:1	2.29:1

2-STAGE GEAR REDUCTION

lean burn control systemdf9.9b and up (not including df250/225/200, df150w)

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.

Data used in the graphs were obtained through "In-House Suzuki Testing" under uniformed conditions. Results will vary depending upon operating conditions (boat design, size, weight, weather, etc.)

Lean Burn

Self adjesting timing chain

self-adjusting timing chainDF40A AND UP

The timing chain runs in an oil-bath so it never needs lubricating, and is equipped with an automatic hydraulic tensioner so it remains properly adjusted at all times.

Advantage

More durability compared to belt types of same class.
Maintenance-free.

Water detecting systemDF70A AND UP

It helps to protect the engine from water in the fuel using a water detecting fuel filter to alert the driver with both visual and audio warnings when water is present in the fuel.

Advantage

Prevents water in fuel, which can be the cause of issues like poor combustion, lower power output and corrosion.

Water detecting system

tilt limit systemDF50AV AND UP (not including DF90AWQH, DF60AQH, DF50A/40A)

Tilt Limit System prevents the outboard from tilting beyond a selected angle.

Advantage

Prevents damage to the boat or outboard due to excessive outboard tilting.

Tilt limit

suzuki troll mode system*(optional for remote control models) df40a and up (not including df250/225/200, df250w, df150w, df90awqh)

This system helps the boat running at a certain speed range in low revs.

Advantage

Boat can keep running at a certain speed range in low revs without having to operate the throttle on the boat.
Gives you highly precise control at low revs.

Najeeb Marine