Honda Outboards – BF50, BF40 Features: BLAST (Boosted Low Speed Torque) Technology for improved acceleration at low speeds, Lean Burn Control for superior fuel efficiency, and PGM-FI (Programmed Fuel Injection) for precise fuel delivery to each cylinder.

Since 1964, Honda has manufactured only four-stroke outboard motors, which are approximately 90 percent cleaner, 50 percent more fuel-efficient and 50 percent quieter than typical two-stroke outboard motors.

In practice the fuel efficiency of the Honda under the green light conditions is very frugal. We tried the motor on a variety of craft and the same was true on each one, the holeshot and economy whilst running on the plane was excellent. The boats we had were a couple of fast RIBs and a Ranieri 26-foot centre console.

Thanks to modern fuel injection systems, today's outboard motors are more fuel-efficient and produce fewer emissions, according to OnlineOutboards.com.

3 now runs up to 60 minutes at full throttle on a tank of fuel. The internal tank facilitates easy removal and portability as a single unit.

4-strokes are more complicated engines and deliver more power and torque. They're also heavier. They deliver power in a smoother, steadier way and they are quieter than a two-stroke. They have more moving parts and the engine endures less stress, so they need less maintenance.

I'd fully expect to get 2500+ hours out of a properly maintained outboard. Mine will never see that many while they're in my possesion. I don't own a boat long enough to put a ton of hours on them. I have an 8 year old Honda 130 with almost 2,000hrs and running strong.

Moisture in the tank If you haven't taken the boat out for a while it's possible the fuel has gone stale (oxidised, meaning it doesn't burn as well). Petrol only really has a shelf life of around 3-4 months in a tank, up to a year with a stabiliser additive.

about 60% to 80% Engines generally use fuel most efficiently when performing at about 60% to 80% of rated output, rather than operating at full throttle. Simply boating at 75% can result in up to 50% fuel savings!

Current recommendations are to use a minimum of 87 octane, 89 octane is preferred. There is no additional benefit from using higher-octane fuels, in fact they may cause hard starting conditions in hot weather.

A 2 stroke jet board engine is considered the most reliable and can log 1500 to 2000 hours before any major repairs. Also, because they don't have many moving parts, they require fewer maintenance services and can be a great option for long-term use. However, that does not mean they are invincible.

about 1500-2000 hours Well-maintained inboard engines, inboard outboard engines (unless diesel), and outboards have a serviceable average life of about 1500-2000 hours. If you're looking at a gas-fueled marine engine close to or exceeding 1000 hours, inboard or outboard, proceed with caution.