BF40
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  • Multi-port Programmed Fuel Injection
  • Best Charging Capacity in Class
  • Lightest Weight in Class!
  • Exclusive BLAST Technology (Boosted Low Speed Torque)
  • Best in Class Fuel Efficiency
  • High Performance, Heavy-Duty Gear Case

Performance and Efficiency

4-Stroke Design

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

Lightest in its class

Honda’s elegant 40 hp design is the lightest engine available in its class. Perfect for aluminum boats, inflatables, skiffs and flats boats.

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.

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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.

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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.

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High Performance Gearcase - gets you going faster

Designed to get you going faster, the BF40'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.
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Offset Crankshaft Design

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

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

800 RPM Trolling

Fishermen will appreciate the low trolling speed of the BF40.

Reliability and Durability

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.

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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.

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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.

Convenience and Ease of Use

Superior Battery Charging - More usable power

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

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3 Position Tiller Handle

Adjusts to a comfortable angle for easiest hull manueverability.

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°

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Easy Maintenance

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

Built-In Pitot Tube

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

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.

Available in a 20 inch shaft length

Engine

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

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

Equipment

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

Dimensions

Overall Width 372 mm/14.7 inches

Dry Weight

L-Type 97 kg/214 lbs.

Transom Height

L Type 508 mm/20 inches

Owner's Manuals

Serial Number
BAYL-1000001-1999999 Download
BAYL-2000001-3199999 Download
BAYS-3200001-3209999 Download
BAYS-3210001-3219999 Download
BAYS-3220001-3229999 Download
BAYS-3300001-3309999 Download
BAYS-3400001-3409999 Download
BAYS-3500001-3599999 Download
BAYS-3600001-3699999 Download
BAYS-3700001-9999999 Download
BAYU-1000001-1999999 Download
BAYU-2000001-3199999 Download
BBDJ-1000001-1099999 Download
BBDJ-1100001-9999999 Download