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2018 Honda Marine BF40 20 in Outboard Motor

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Product Description

2018 Honda Marine BF40 20 in Outboard Motor


BF40 is the lightest, most fuel efficient and best charging capacity engine in its class. Perfect for aluminum boats, inflatables, skiffs and flats boats, it gives you exceptional performance thanks to Boosted Low Speed Torque (BLAST®), Multi-Port Programmed Fuel Injection (PGM-FI®) and High Performance, Heavy-Duty Gear Case.

Performance and Efficiency

Honda's Four-Stroke Engine Design: World-renowned Honda quality, proven reliability with no oil mixing.

Offset Crankshaft Design: Locates the powerhead directly over transom bracket pivot point for smoother operation of trim and tilt, as well as reducing stress on the transom and steering effort. Also,it reduces vibration and improves performance and handling. It also provides for a very compact design.

Non-Linear Mounting System: Patented non-linear mounting provides smoother operation at all engine speeds.

Reliability and Durability

Over-Rev Protection: Standard rev-limiter protects the engine from severe damage caused by over-revving.

Overheat and Low-Oil-Level Warning Systems: Standard overheat and low-oil warning systems offer peace of mind and protect your investment.

Fresh Water Flushport: Allows easy hook-up of a garden hose to flush debris and salt water out of the engine, extending the life of the outboard (optional Flush Kit required).

Sacrificial Anodes: The BF40 has 1 internal and 2 external sacrificial anodes to protect all metal components from corrosion.

Three-Year Warranty: The best outboards in the industry are backed by the best warranty in the business, 3 years parts and labour.

Convenience and Ease of Use

Light, Compact Design: Three-cylinder design allows for smooth operation while remaining compact.

Forward-Mounted Shift Lever (with Tiller Kit): Allows easier shifting, especially when docking or in tight access areas.

Superior Battery Charging: There's always plenty of electric power with the 40 hp. Honda’s innovative technology enables this engine to output nearly twice as many charging amps as the competition’s.

Built-in Pitot Tube: A Pitot tube is designed into the lower gearcase and allows a direct hook-up for your speedometer.

Standard Gauges, Propeller and Control Box: Tachometer, trim gauges, aluminum propeller and a high-quality, side-mount control box are included with Power Tilt and Trim models.


Type: 4-Stroke SOHC; 3 Cylinders / 6 Valves

Displacement: 808 cc / 49.4 cu.in.

Bore & Stroke: 70 mm x 70 mm (2.76 x 2.76 in.)

Full Throttle RPM Range: 5,000-6,000 rpm

Propshaft Rated Horsepower (HP): 40 hp @ 5,500 rpm

Cooling System: Water Cooled

Fuel Delivery: Programmed Electronic Fuel Injection (PGM-FI)

Recommended Fuel: Unleaded Gas. (Min. Pump Octane 86)

Ignition System: MicroComputer Programmed

Starting System: Electric

Exhaust: Through Prop Hub

Lubrication: Pressure Lubrication (Trochoid pump)

Recommended Oil: SAE 5W30 API service classification SJ or later

Oil Capacity: 2.10 L(1.85 Imp. qt.) with oil filter repl.

Trim Range: -4 deg. to +12 deg.

Tilt Range: 63 deg.

Steering Angle: 35 deg.


Gear Ratio: 2.08:1

Gear Shift: F-N-R


Alternator (Electric Start): 22 amp / 275 watts

Battery Charging Power: 17 amp

Power Trim & Tilt: Standard

Oil Pressure Alert: Standard

Over Rev-Limiter: Standard

Temperature Alert: Standard

Battery Condition Alert: Standard

Speedometer Pickup: Standard

Variable Speed Trolling Kit: Optional


Overall Width: 372 mm / 14.6 in.

Transom Height (L-Type): 556 mm / 21.9 in.


Propeller Type: 3-Blade (Aluminum)

Propeller Diameter x Pitch (L-Type): 11-1/4 x 13 in.

Dry Weight

LRTC-Type: 98 kg / 216.1 lb.



2018 Honda Marine BF40 20 in Outboard Motor


Engine Type

4-Stroke SOHC; 3 Cylinders / 6 Valves

Bore x Stroke

70 mm x 70 mm (2.76 x 2.76 in.)


808 cc (49.4 cu.in.)




Shaft Length

556 mm (21.9 in.)


98 kg (216.1 lb.)


Trim Method

Power Trim & Tilt

Propshaft Horsepower

40 hp @ 5,500 rpm

Full Throttle Operating Range

5,000-6,000 rpm

Gear Ratio / Shift

2.08:1 / F-N-R

Fuel Induction

Programmed Electronic Fuel Injection (PGM-FI)


22 amp / 275 watts


Water Cooled




36 months non-commercial use; 12 months commercial use


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