Go further, faster, for less with Suzuki's Lean Burn Control System

Suzuki is renowned for being at the forefront of four stroke technology and creating outboard motors that boast a variety of innovative features. Their latest generation of outboards are no different – not only are they lightweight, compact and powerful but they deliver class – leading fuel efficiency, courtesy of Suzuki's Lean Burn Control System. 

First introduced on the DF70A/80A/90A in August 2008, Suzuki has continued to update its range of electronic fuel injected (EFI) outboards with this technology, even creating the world's first battery-less EFI outboard engines in the DF15A and DF20A. The latest models to benefit from Lean Burn Fuel Control will be Suzuki's 'big block' DF150 and DF175, which will be launched later this year. 

Driven by their passion for continual product development and the fact that the rising cost of fuel is becoming an increasingly important factor for customers deciding what outboard to buy, Suzuki's engineers have developed a system that enables their outboards to get even more out of every drop of fuel. 

The Lean Burn Control System predicts fuel needs according to operating conditions. This allows the engine to run on a more efficient fuel mixture through the use of a lean air-fuel ratio. A normal petrol engine will run with an air fuel ratio of 14.7:1, whereas a Lean Burn system can increase this as high as 19:1, which is a significant improvement in efficiency. The Lean Burn process requires fuel to be injected into the cylinder at a precisely controlled rate and volume with a richer air-fuel mixture at the start of the injection cycle, assisting ignition, to a weaker one at the end. 

This creates a longer burn time and a more controlled explosion of the fuel, over the full downward stroke of the piston. This in turn means that there is power over the whole combustion stroke and subsequently a more efficient and complete burning of all the fuel available; leading to more power for less fuel and less emissions. 

Unlike other manufacturers, Suzuki's Lean Burn Control System has been developed so that it delivers these benefits over a wide operating range, providing significant improvements in fuel economy from low speed operation into the cruising range. 

Suzuki's unique Lean Burn Control System gives its outboards a superior selling point over its competitors by providing a wide range of lean burn which enables the outboard to run on less fuel right up into the high speed range. 

When combined with technologies that Suzuki already employs, such as multi-point sequential electronic fuel injection, variable valve timing, long track intake manifold and multi-stage induction, its range of mid to large horsepower outboards become a very attractive power option for leisure and commercial users alike as a more fuel efficient outboard means reduced running costs. 

New models from Suzuki, particularly those featuring Lean Burn Fuel Control, are consistently well received by boat builders, boat users and the marine media alike with the technology now well established and proven in both the leisure and commercial markets throughout Europe. 

For example, in Germany, a Suzuki DF300AP is used by Jörg Leonhard, who runs a charitable project called Wings for Handicapped, which invites disabled children and parents to a day of adventure on the water, free-of-charge. Commenting on the performance of the Suzuki outboard, Jörg said, “This is now the second Suzuki DF300 that I have used and I can say that the Lean Burn version delivers much better fuel consumption compared to the previous DF300. But this does not mean that there is no performance. In fact, the opposite is the case. With this new generation of outboard I have much quicker acceleration to the same top speed but also the sound levels are lower which is much better for me as the driver and much better for my passengers and the environment.” 

In the UK, Suzuki provides the power to a fleet of RIBs operated by a company called Solent RIB Charter. Using a combination of 250hp and 300hp V6 outboards, it runs 32 Suzuki powered RIBs that are available to charter for commercial use, leisure use and special events. Richard Ward, Director of Solent RIB Charter, said, “Suzuki's V6 outboards provide the perfect combination of power and durability for our charter RIBs. We have a combination of Lean Burn and non-Lean Burn engines and we can definitely tell the difference. The Lean Burn technology gives impressive fuel efficiency, whether we are at low speed on a photoshoot or high speed cruising on a corporate event, which means that we can get more hours on the water out of every tank of fuel.” 

It's not just the flagship V6 models that are proving popular with commercial operators. In France, the rowing school Cercle Aviron de Nantes, has just completed a successful trial to use the new DF15A with its battery-less electronic fuel injection and Lean Burn Fuel Control. The outboards will be used to power the club's safety boats and the club will be upgrading from Suzuki's original DF15. The club's Purchasing Manager Thierry Cornet said, “The fuel consumption is lower on Suzuki's new DF15A. The starting is easier and more pleasant. All our staff agree that Suzuki's new model is the right outboard for the job, so much so that we now have friendly quarrels as everyone wants to use the new Lean Burn engine!” 

In Italy, Suzuki works very closely with the boat builder Ranieri International. Mr Salvatore Ranieri, owner of the company, said, “With the Lean Burn system, Suzuki has taken an important step forward in terms of reducing fuel consumption and giving greater respect to the environment. We did a lot of tests on our boats, and we were able to evaluate and perceive the differences between the previous series without the Lean Burn system and the new ones equipped with this technology. I must say that the results are excellent and I think that our customers are appreciating this technical feature of the new Suzuki range.” 

In addition to these fantastic industry endorsements, the popularity of Suzuki's Lean Burn outboard models has been reflected in sales increases in many markets and has helped Suzuki to be the fastest growing outboard brand in Europe. There is no reason to doubt that market reaction to the new DF15A/20A and DF150/175 will be any different and help Suzuki gun for the top spot as market leader. 


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