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Ready to take you to great places. Like the head of the class.

The BF40 and BF50 are an outstanding combination of Honda’s legendary four-stroke engineering and our latest outboard innovations. The result? The lightest, most compact engines in their class. And because they are from Honda, they’re loaded with unparalleled features and technology.

Like BLAST (Boosted Low Speed Torque) for vastly improved hole shots. Programmed Electronic Fuel Injection, for easy starts, instant throttle response, and overall better fuel economy. Lean Burn Control stretches your gas even further by allowing a leaner air-to-fuel mixture.

Put it all together, and you’ll l find that the BF40 and BF50 aren’t just at the head of the class. They’re in a class by themselves, redefining mid-range four-stroke performance.

Powerful Performance

Instant Acceleration

Honda’s exclusive BLAST system improves acceleration at low speeds. The result? Instant acceleration and improved hole shot.
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High Performance Gearcase

Designed to get you going faster, the BF40 and 50's gearcase reduces drag, greatly reduces hull porpoise and minimizes spray, increasing acceleration and top speed.

Mikuni Intake System

The lightweight Mikuni long tube intake track system helps build low end torque, improving performance.

Lightweight and compact

Because of Honda’s elegant design, the BF40 and 50 are among the lightest, most compact engines in their class. Perfect for aluminum boats, inflatables, skiffs and flats boats.

Superior Fuel Efficiency

Best In Class Fuel Efficiency

Lean Burn Control increases fuel efficiency by allowing combustion to operate on a leaner air/fuel mixture. At cruising speed, this engine runs on up to 20% less fuel* than others in its class.
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Multi-port Programmed Fuel Injection adds both easy starts and improved fuel efficiency - without sacrificing performance.

Tough Corrosion Resistance

4-Front Corrosion Protection System

Honda’s exclusive 4-Front Corrosion Protection System offers a patented, double-sealed multi-layered paint process.

Fresh Water Flushport

Fresh water flushport flushes debris and saltwater out of the engine.

Legendary Reliability

Honda Quality

Our outboards share many technologies and components used in Honda vehicles, with all the benefits of years of proven Honda engineering, precision manufacturing and reliability.

Unmatched peace of mind

Honda's True 5 Warranty is the best in the business. This transferable, non-declining warranty is the same on the last day as it is on the first.

Engine Alert System

The Engine Alert System uses visual, audio and RPM reduction circuits to alert the operator of over-heating, low oil PSI and over-revving.

Easy Ownership

On-board connectivity

NMEA 2000 protocols allow engine data to be interfaced with on-board systems and systems displays, such as SONAR or GPS.

High Output Charging for more usable power

The high output charging system features a 22 amp "On Demand" belt-driven alternator with 17 charging amps. This superior design enables the 40 and 50 to put out nearly twice as many charging amps as the competition’s.

Easy Maintenance

Easy access side-mounted oil filter and oil fillers simplify maintenance, while "screw-type" valve adjusters reduce maintenance costs.

Fishing Friendly Tiller

3 Position Tiller Handle

The 3 Position Tiller Handle adjusts to your comfort for easiest hull maneuverability.

Easy Access Controls

The center mounted, ergonomically designed tiller handle is longer for improved handling. Adjustments for throttle and steering friction allow easier control. Up front shift lever, PTT switch, and engine alert lamps provide added convenience.

Attractive Options

Variable Trolling Speeds

An optional switch allows for variable trolling speeds, ideal for fishermen.

Power Trim/Tilt

Allows you to trim the unit for maximum performance and handling.
Trim Range: - 4° to +16°
Tilt Range: 63°


Engine BF40 BF50
Type 4-Stroke SOHC, 3 Cylinder, 2 Valves/Cyl. 4-Stroke SOHC, 3 Cylinder, 2 Valves/Cyl.
Displacement 808 cc (49.4 cubic inches) 808 cc (49.3 cubic inches)
Bore & Stroke 70 mm x 70 mm (2.8 x 2.8 inches) 70 mm x 70 mm (2.8 x 2.8 inches)
Full Throttle RPM Range 5,000-6,000 RPM 5,500-6,000 RPM
Rated Power 40 HP @ 5,500 RPM 50 HP @ 6,000 RPM
Cooling System Water Cooled Water Cooled
Fuel Delivery Programmed Fuel Injection Programmed Fuel Injection
Ignition System MicroComputer Programmed MicroComputer Programmed
Starting System Electric Electric
Exhaust Through Hub Through Hub
Lubrication Wet Sump Wet Sump
Trim Range -4° to +16° -4° to +16°
Tilt Range 63° 63°
Drive BF40 BF50
Gear Ratio 2.08:1 2.08:1
Gear Shift F-N-R F-N-R
Equipment BF40 BF50
Alternator with voltage regulator 22-Amp (275 watt) 22-Amp (275 watt)
Battery Charging Power 17 Amps 17 Amps
Propeller Optional Optional
Power Tilt NA NA
Power Trim & Tilt Available Available
Gas Assisted Tilt Available Available
Oil Pressure Alert Standard Standard
Temperature Alert Standard Standard
Rev-Limiter Standard Standard
Speedometer Pickup Standard Standard
Dimensions BF40 BF50
Overall Width 372 mm/14.7 inches 372 mm/14.7 inches
Transom Height BF40 BF50
L Type 508 mm/20 inches 508 mm/20 inches
X Type NA 635 mm/25 inches
Dry Weight BF40 BF50
L-Type 97 kg/214 lbs. 97 kg/214 lbs.
X-Type NA 101 kg/223 lbs.

Performance Tests

Boat Length Engine HP Prop
EASTCAPE CANOES CAIMEN 17 SC 17' - 10"" BF50D 50 Powertech 14p Custom
CARIBE INFLATABLES CL14 11' - 4"" BF50D 50 Solas 11 x 14 x 3
ALUMACRAFT CLASSIC 165 TILLER 16' - 5"" BF40D TILLER 40 Solas 11.1 x 13 x 3
POLAR KRAFT V 165 SC KODIAK 16' - 4"" BF50D 50 Solas 11 x 13 x 3
PREMIER SUN SPREE 200 21' - 0"" BF50D 50 Solas 11 x 9 x 3
SMOKERCRAFT 160 PRO ANGLER 16' - 0"" BF50D 50 Solas 10 x 14 x 3
TRIUMPH 170 CC 16' - 10"" BF50D 50 Solas 11 1/8 x 13 x 3
VOYAGER SUPREME CRUISE DELUXE 16' - 10"" BF50D 50 Solas 11 x 9 x 3
ALUMACRAFT 16 MV TEX SPECIAL 16' - 0" BF50D 50 Solas 11.4 x 12 x 3
HEWESCRAFT 160 SPORTSMAN (2) 16' - 5" BF50D 50 Solas 11 3/8 x 12 x 3
HEWESCRAFT 160 SPORTSMAN (2) 16' - 5" BF50D 50 Solas 11 1/8 x 13 x 3
Walker Bay Generation 400 13’ 1” BF50D 50 Solas 11 ¼ X 13”
Grand 340 Gold Line 11' 10" BF40D 40 Stainless Steel 11 X 15 X 3
Walker Bay 340 11' 2" BF40D 40 Aluminum 10.875 X 12 X 4
Walker Bay 340 11' 2" BF40D 40 Aluminum 10 X 13 X 4
Walker Bay 340 11' 2" BF40D 40 Stainless Steel 11.125 X 13 X 3

Owner's Manuals

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