Fuel Savers Suzuki Lean Burn
 
Rising fuel cost have boaters thinking hard before planning a day out onto the water. Recognizing the need for fuel-efficient outboards, Suzuki engineers have designed the new DF90, 80 and 70, incorporate Suzuki’s Lean Burn Control System. Its benefits are delivered over wide operating range, providing significant improvements in fuel economy from low speed operation well up into the cruising range.
Go Farther with the Same Amount of Fuel
Comparison of Running Distance per 1 Liter of Fuel
Data used in the graphs were obtained through in-house testing under uniformed conditions. Results will vary depending upon operating conditions (boat design, size, weight, weather, etc.)

* in comparison with the original DF90		   Suzuki Lean Burn System
Lean burn engines are designed to operate on a lean air-fuel ratio, in other words, a thinner mixture of fuel. Suzuki’s Lean Burn Control System controls the air to fuel mixture by predicting fuel needs according to operating conditions. Using this to deliver a leaner fuel mixture to the engine, produces better fuel economy.		  
How Lean Burn Effects Fuel Consumption

With Suzuki Lean Burn Control System, DF90/80/70 can run on less fuel than normal combustion system.

Comparison of Fuel Consumption per 1 Hour
Data used in the graphs were obtained through in-house testing under uniformed conditions. Results will vary depending upon operating conditions (boat design, size, weight, weather, etc.)
The making of a compact outboard  
Suzuki’s engineers are well known for their ability at reducing the size of the outboard. Their skills have created some of the most compact four-stroke outboards in their respective classes. Taking a fresh approach to the DF70/80/90, every part and component has been designed from the ground up. Applying the knowledge and technical advancements gained over the last ten years they have succeeded again at reducing outboard size and weight.
     

Mechanically Efficient Design
Looking beyond fuel systems for solutions, Suzuki engineers explored ways they could improve efficiency by reducing mechanical loss. They designed a new oil pump that delivers greater mechanical efficiency, and improved hydrodynamics in the lubrication system, allowing oil to move through the system with less resistance. In reducing mechanical loss in these and other areas, Suzuki has created a more efficient engine that contributes to better fuel economy.

Multi-Point Sequential Electronic FuelInjection
The first generation DF70 was awarded the National Marine Manufacturers Association’s Innovation Award for, among other firsts and advancements, its use of Suzuki’s Multi-Point Sequential Electronic Fuel Injection system. The second generation DF70/80/90 use this sophisticated system once again to deliver instant throttle response, improved fuel economy, and low emissions. The system uses the ECM’s 32-bit computer, which gathers and processes vital operating data in real time from a series of sensors located in critical areas on the engine, to calculate the optimum amount of fuel and air to be injected at high pressure into the cylinders. The system offers excellent fuel efficiency and reduces emissions enabling these outboards to meet Euro 1 Emissions Standards. Other benefits include smooth starts, and maximum operating efficiency.

Streamlined Gear Case and Highly Efficient Propeller
The lower gear case on all three outboard motors utilizes a hydrodynamic design that was first introduced on the flagship DF300. As the lower unit moves through the water its sleek form reduces drag by up to 36% compared to conventional designs, contributing to faster acceleration and increased speed.
Thanks to the robust torque delivered with Suzuki’s two stage gear reduction, these outboards can turn a large diameter propeller. Suzuki engineered a new highly efficient propeller that takes advantage of this torque to provide faster acceleration and higher top speed.

High Output Alternator
Suzuki’s DF70/80/90 feature powerful 27A alternators that are designed to generate the bulk of their power at low rpm. These high-output alternators deliver 22A even at a low 1,000 rpm. In most situations, that’s enough power to keep an assortment of marine electronics and other accessories operating all day long.

Dual Engine Flush Ports
The buildup of salt, sand, and dirtin the engine’s cooling system can lead to damage over time. The DF70/80/90 are designed with dual freshwater flush ports to makeflushing of the cooling system as convenient as possible. One inlet located on the port side and a second on the front panel provide easy access and facilitate flushing of the system whether the boat is in or out of the water.







Euro 1 Emissions Standards Label
(EU Directive 2003/44/EC)
This label identifies outboard motors that conform to EU emissions standards for exhaust gases and noise levels set by the European Parliament and Council. DF70, DF80, DF90 all conform to these standards, which are effective from January 1st, 2006.

   Offset Driveshaft
Pioneered with the first generation DF90, Suzuki’s offset driveshaft has played an effective role in reducing the size of the outboard. The design uses intermediate reduction gearing to position the crankshaft in front of the driveshaft, moving the outboard’s center of gravity forward for better weight distribution on the transom. It also provides improvements in power performance, balance, and vibration reduction. Combining the offset driveshaft with a newly designed powerhead, Suzuki engineers have created an outboard that is about 7.5cm (3 inches) shorter than the original DF90 and up to 23cm (9 inches) shorter than competitive models making the new DF90 the most compact outboard in its class. Its compact design facilitates installation on a wider range of boats, and offers more room around the transom for fishing and other activities.

DOHC 4-Valve Engine
The DF70/80/90 benefit from Suzuki’s unrivaled experience in the design and manufacture of motorcycle, automotive, and marine engines. Drawing upon their past advancements and achievements, Suzuki engineers have provided these new outboards with advanced engineering that delivers high power output, performance, fuel economy, and efficient operation.
Starting with an in-line 4-cylinder block, Suzuki designed an all new, more compact dual overhead cam (DOHC) powerhead with four valves per cylinder. Its design has reduced the overall size of the outboard while providing high performance power. Power is delivered via a two-stage mixed cam drive system consisting of gears that transfer power between the crankshaft and the drive shaft, and a chain that delivers power from the drive shaft to the camshaft.

Two-Stage Gear Reductio
To take maximum advantage of the power produced by these high performance engines, Suzuki engineers have utilized a two-stage gear reduction ever since the introduction of the original DF90. The second generation DF70/80/90 follow in their predecessor’s footsteps employing the same method to provide an efficient means of supplying maximum propulsion.
The key to gaining maximum propulsion is through the use of a large diameter propeller with a suitable pitch. But spinning a larger propeller requires more torque, which requires larger gears or a larger gearbox adding weight and resistance that do not always produce effective results.Suzuki engineers have long used a two-stage gear reduction system that provides the needed torque without adding unwanted bulk and weight. Through this method, the DF70/80/90 achieve a powerful 2.59:1 final drive ratio, producing the needed torque for quick acceleration and great top-end speed.

Suzuki Easy Start System
The Suzuki easy start system no longer require to hold the key until the engine start. Now simply turn the key and release and the starter will stay engaged until the engine starts.
The system also features more precise cylinder detection, fuel injection, and ignition control to deliver smoother and improved starts, more efficient combustion, and greater fuel economy making the outboard more environmentally friendly.

Timing Chain
The DF70/80/90 are equipped with a timing chain that uses an automatic hydraulic tensioner to keep tension in check. The system provides users with years of maintenance free operation.


New Trim and Tilt Limit System
The new trim and tilt limit system is designed to protect the boat from damage that can occur when tilting the outboard. The system is designed with a tilt angle sensor that incorporates both the functions of a tilt limit and trim sender. Using a step-free, continuous type tilt limiter makes installation of the outboard possible on nearly any type of boat.

Suzuki Anti Corrosion Finish
Suzuki’s specially formulated anti-corrosion finish increases the durability of the engine and helps to protect parts of the aluminum exterior that are constantly exposed to saltwater. Applied directly to the outboards exterior, this advanced finish allows maximum bonding of the finish to the outboard’s aluminum surface, creating an effective treatment against corrosion.