The BF40 and BF50 are physically identical. The 10-horsepower difference is accomplished within the engine's computer, which simply adjusts timing and fuel delivery to degrade the 40's output. The specs say the 40 makes peak power at 5500 rpm, while the 50 peaks at 5750.

1964 Ever since the introduction of the first four-stroke outboard in 1964, the GB30, Honda has pioneered the development of four-stroke in line with founder Soichiro Honda's philosophy that 'products used on the water should not pollute the water'.

214 lbs. 97 kg/214 lbs.

What it's allowing you to do is to get better performance maneuverability. In the actual outboard motor. So it helps with heavier loads. So that's something to look at depending.

Top speed from the Honda BF40 outboard motor on the McLay 441 Fortress was around 24 knots with one person on board.

Because they have fewer parts, 2-stroke motors are generally smaller and lighter than 4-stroke motors. Lighter weight also allows 2-stroke engines to run faster. As a result, when making a 2-stroke vs. 4-stroke outboard power comparison, 2-stroke motors usually win out.

Realizing a Lighter, More Compact Engine Honda's fuel efficient, low-vibration, low-noise, high-environmental performance, ultra-small 4-stroke engines combine the advantages of a 2-stroke engine (lightweight, compact, flexibility of use) with the high environmental performance of a 4 stroke engine.

In a 4-stroke outboard, the piston needs four movements (strokes) in order to complete a cycle – intake, compression, combustion and exhaust. Conversely, a 2-stoke only needs two movements of the piston to complete the same action.

At WOT, the BF40 averaged 47.4kmh with the revs holding at 5600 and the fuel consumption at 14.1lt/hr.

204 lbs Specifications - 40 EFI

The Power Thrust design gives an even more powerful and world-known Honda four-stroke motor, with 60% more thrust in reverse and 15% more in forward.

An outboard motor is a dedicated marine engine that is attached directly to the stern of a boat. Outboards are available from tiny 2-horsepower kickers to 600 horsepower, but for family boating the range is typically 90 to 300 horsepower.

The outboard motor speed and range depend on your specific boating situation. Here we take the 9.9 HP Navy 6.0 as an example (supported by one 8960 Wh E175 battery). If you use it on a 12-foot aluminum boat with one person onboard in clam water, you can expect 15 mph (24.3 kph) at max power.

Honda NT650