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.
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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.
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115PS class |
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Honda’s proprietary acceleration-enhancing technology, the BLAST system boosts torque during sudden acceleration by simultaneously optimizing the air/fuel ratio and ignition timing. |
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Honda calculations, based on fuel consumption in EPA EM measurement mode |
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Honda calculations, compared to previous BF115 model |
| *5 |
115PS class (Honda calculations) |
Key Features of the BF115
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Acceleration and cruising performance |
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Honda’s proprietary acceleration-enhancing technology, BLAST, enhances acceleration performance through simultaneous, computer-controlled optimization of the air/fuel ratio and ignition timing.
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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.
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A large-diameter propeller with outstanding propulsion efficiency is matched with a 2.14 reduction gear ratio to deliver high-thrust power.
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Fuel economy |
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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.
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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. |
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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) |
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Durability |
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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.
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Easy maintenance |
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A flush valve joint permits easy engine cleaning after use.
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A two-piece under-cover promotes greater ease of maintenance.
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The lightweight engine cover opens with a single lever for fast, easy removal.
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Environmental performance |
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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.
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| *12 |
CARB: California Air Resources Board |
| *13 |
Top rating (3 stars) for FY2008 (current product) |
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BF115 Specifications |
| Model |
BF115D |
| Steering System |
Remote |
| Device Type |
LN |
XN |
XCN |
| Type |
BBHJ |
| 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 |
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The propeller, remote control, gauges and other parts for the BF115 may be optional (sold separately). |
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Photo Index | | 
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June 3, 2010 
