Reliable, efficient 4-stroke design

World-renowned Honda quality combines proven reliability and superior fuel efficiency, with no oil mixing.

Meets NMEA 2000 standards – on-board connectivity

NMEA 2000 protocols allow engine data to be displayed on NMEA 2000 compliant dashboard electronics, like sonar and GPS.

Lean Burn Control^® – Superior 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 as much as 20% less fuel* than others in its class.
*Based on the EPA’s Specific Fuel Consumption Mode.

BLAST^® System – improves acceleration at low speeds

Boosted Low Speed Torque, or BLAST, improves acceleration at low speeds. A quick movement of the throttle control activates the BLAST^®system, advancing the ignition curve aggressively. “Hole Shot” is vastly improved as more horsepower gets the hull up on plane quicker.

Programmed Fuel Injection – Powerful performance

Programmed Fuel Injection delivers the precise amount of fuel/air to each cylinder. The result is easy starts and instant throttle response with superior fuel efficiency.

Superior Battery Charging – More usable power

There’s always plenty of electric power with the 40 and 50hp. Honda’s innovative technology enables these engines to put out nearly twice as many charging amps as the competition’s.

High Performance Gearcase – gets you going faster

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

• • A longer anti-ventilation plate helps trap water flowing to the propeller to minimize porpoising
  • A streamlined front and longer bullet reduce drag for enhanced acceleration and fuel efficiency

A front splash plate reduces spray from the hull bottom, maintaining a dry deck above.

3 Position Tiller Handle – comfortable and easy to use

Adjusts to a comfortable angle for easiest hull manueverability.

Engine Alert System – Keeps you informed

Audio and visual cues combine with RPM reduction circuits to alert the operator of overheating, low oil PSI and over-revving to prevent engine damage.

Tiller models feature a new 4-lamp warning system built into the tiller handle, while remote control models deliver alerts via messages through Honda’s multi-function digital gauges or a special indicator built into the unit’s control box.

4-Front Corrosion Protection System – Fights the elements

A patented, “Double Sealed” multi-layered paint process. Sacrificial anodes and stainless steel technology, along with waterproof connectors, all enhance corrosion protection.

Lightweight

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

Ultra Low 3 Star CARB Emissions

Environmentally conscious technology. All Honda Marine engines exceed the highest CARB 3-Star rating to meet the rigorous California Air Resource Board’s standards.

True 5 Warranty

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

Center Mount Tiller – Easier control

The 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.

Power Trim/Tilt

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

Fresh Water Flushport

Flushes debris and saltwater out of the engine, extending the life of the outboard.

Easy Maintenance

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

Offset Crankshaft Design – better performance

Honda’s exclusive crankshaft design locates the powerhead directly over the transom pivot point. This has two effects. It reduces vibration and improves performance and handling. It also provides for a very compact design.

Non-Linear Mounting System – smoother operation

Patented non-linear rubber mounts provide smoother operation at all engine speeds.

Mikuni Intake System – better performance

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

Fisherman Friendly 800 RPM Trolling

Fishermen will appreciate the low trolling speed of the BF40 and 50.

Built-In Pitot Tube

Built-in pitot tube in the gear case eliminates the need to drill holes in your boat for installation.

The BF40 is available in 20″ shaft model.

Engine

	BF40
Type	4-Stroke SOHC, 3 Cylinder, 2 Valves/Cyl.
Displacement	808 cc (49.4 cubic inches)
Bore & Stroke	70 mm x 70 mm (2.8 x 2.8 inches)
Full Throttle RPM Range	5,000-6,000 RPM
Rated Power	40 HP @ 5,500 RPM
Cooling System	Water Cooled
Fuel Delivery	Programmed Fuel Injection
Ignition System	MicroComputer Programmed
Starting System	Electric
Exhaust	Through Hub
Lubrication	Wet Sump
Trim Range	-4° to +16°
Tilt Range	63°

Drive

	BF40
Gear Ratio	2.08:1
Gear Shift	F-N-R

Equipment

	BF40
Alternator with voltage regulator (Electric Start)	22-Amp (275 watt)
Battery Charging Power	17 Amps
Propeller	Optional
Power Tilt	NA
Power Trim & Tilt	Available
Oil Pressure Alert	Standard
Temperature Alert	Standard
Rev-Limiter	Standard
Speedometer Pickup	Standard

Dimensions

	BF40
Overall Width	372 mm/14.7 inches

Transom Height

	BF40
L Type	508 mm/20 inches
X Type	NA

Dry Weight

	BF40
L-Type	97 kg/214 lbs.
X-Type	NA