News Release 2010
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Power ProductsJapanJune 3, 2010

Honda Releases the All-new BF115 4-stroke Outboard Engine Featuring Best-in-Class Acceleration and Fuel Economy

June 3, 2010 - Honda Motor Co., Ltd. has announced the release of the all-new BF115 (115PS) outboard engine, to debut on June 3 at Honda outboard engine dealers throughout Japan.

BF115 4-stroke outboard engine

BF115 4-stroke outboard engine

The all-new BF115 combines a 2.4 liter engine, the largest in its class*1, with the same BLAST*2 (Boosted Low Speed Torque) air/fuel ratio and ignition timing technology made popular in Honda’s mid-to-large outboard engine series, to achieve prodigious acceleration along with outstanding torque characteristics over a wide range of engine speeds from low to high. The versatile BF115 can be used in a broad range of applications, from fishing boats to runabouts for leisure use.

A lean-burn system has also been added, boosting fuel economy by 20%*3 over the previous model*4 to deliver a combination of powerful acceleration and outstanding fuel economy. The BF115’s battery charging performance, the best in its class*5, helps support the ever-increasing need for onboard device power.

*1 115PS class
*2 Honda’s proprietary acceleration-enhancing technology, the BLAST system boosts torque during sudden acceleration by simultaneously optimizing the air/fuel ratio and ignition timing.
*3 Honda calculations, based on fuel consumption in EPA EM measurement mode
*4 Honda calculations, compared to previous BF115 model
*5 115PS class (Honda calculations)

Key Features of the BF115
Acceleration and cruising performance
· Honda’s proprietary acceleration-enhancing technology, BLAST, enhances acceleration performance through simultaneous, computer-controlled optimization of the air/fuel ratio and ignition timing.

· The DOHC 2.4 liter in-line 4-cylinder engine boasts the largest displacement in its class, ensuring torquey performance over a wide range of engine speeds and best-in-class top speed.

· A large-diameter propeller with outstanding propulsion efficiency is matched with a 2.14 reduction gear ratio to deliver high-thrust power.

Fuel economy

The BF115 employs an LAF sensor*6-equipped, PGM-FI*7 electronic fuel injection system to achieve lean-burn control*8 while cruising*9, delivering best-in-class*10 cruising fuel economy.

*6 The LAF (Linear Air-Fuel ratio) sensor determines the engine combustion air/fuel ratio based on oxygen and unburned-fuel densities in the exhaust gas, allowing precise optimization of air/fuel ratios.
*7 PGM-FI (Programmed Fuel Injection) is a Honda registered trademark.
*8 The mode in which lean-burn control is used during cruising to achieve higher fuel economy is referred to as ECOmo.
*9 ‘Cruising’ refers to the operating speed range in which engine speed is maintained at approximately 50-80% of maximum rpm, with the throttle wide open.
*10 115PS class (Honda calculations)

· The BF115 is equipped with four warning lights, including an oil pressure alert, overheat alert, ACG warning, and PGM-FI electronic fuel injection system warning to detect any malfunction or irregularity and alert the operator.

Easy maintenance
· A flush valve joint permits easy engine cleaning after use.

· A two-piece under-cover promotes greater ease of maintenance.

· The lightweight engine cover opens with a single lever for fast, easy removal.

Environmental performance
· The BF115 displays outstanding environmental performance, surpassing US CARB*12 emissions standards*13—the most stringent in the world. It also exceeds secondary restrictions on marine engine emissions established by the Japan Boating Industry Association by a significant margin.

*12 CARB: California Air Resources Board
*13 Top rating (3 stars) for FY2008 (current product)

BF115 Specifications
Model BF115D
Steering System Remote
Device Type LN XN XCN
Environmental Conservation Organization Certification Number (issued in Japan) 21 Ocean No. 0002
Engine Water-cooled, 4-stroke, inline 4-cylinder, vertical shaft, DOHC, 4 valves per cylinder
Displacement (cm3) 2,354
Bore × Stroke (mm) 87×99
Rated Power [kW(PS)/rpm] 84.6(115)/5,250
Recommended rpm range 4,500-6,000
Cooling System Water cooled (with thermostat)
Ignition System Microcomputer-programmed battery ignition
Starting System Electric
Battery Charging Capacity 12V-40A
Exhaust System Underwater (propeller boss discharge)
Fuel Unleaded gasoline
Overall Length (mm) 845
Overall Width (mm) 580
Overall Height (mm) 1,665 1,790
Transom Height (mm) 508 635
Dry Weight (kg, with propeller) 217 220 223

The propeller, remote control, gauges and other parts for the BF115 may be optional (sold separately).
Related Links

· Honda in Japan
· Honda Motor Co., Ltd.
· Honda Worldwide | Power Products
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