Yamaha offers a full model lineup in four stroke engines from 425ps to 2.5ps that deliver superb fuel economy and cleaner emissions. Outboards of 20ps and higher are equipped with high-performance fuel injection to take that performance to even higher levels.
When did Yamaha outboards get fuel injection?
Re: When year did fuel injection begin in outboards? Yamaha came out with their fuel injection in 1997, the same model year as the debut of Evinrude FICHT and Mercury Optimax which are theoretically fuel injected motors.
Are outboard motors fuel injected?
Thanks to modern fuel injection systems, today’s outboard motors are more fuel-efficient and produce fewer emissions, according to OnlineOutboards.com. DFI engines are available in both two- and four-stroke engines.
Are 2 stroke outboards fuel injected?
Traditional two-stroke engines were carbureted. These engines lag when it comes to fuel economy and emissions standards. DFI outboards have the fuel directly injected into the cylinder. … An EFI outboard will use a small computer or electronic system to control the flow of air and fuel.
When did outboards become fuel injection?
In 1957, Mercury’s jet prop, through the propeller hub underwater exhaust, was introduced to the industry. To reduce emissions and make two-stroke outboards more efficient, Mercury was the first to introduce Direct Fuel Injection in 1996.
What is the best boat motor on the market?
Best Outboard Engines
- Suzuki DF25. Above: Hour upon hour of testing has proven the reliability and easy starting of the DF25. …
- Yamaha F25. You’ve gotta love where an engine like the Yamaha F25 can take you. …
- Mercury 75/90/115. …
- Torqeedo Deep Blue. …
- Suzuki DF90. …
- Yamaha V-Max SHO 115. …
- Evinrude ETEC G2. …
- Yamaha F250.
What is the biggest outboard made?
Mercury’s 600 hp V-12 Verado, the world’s largest outboard, has prompted yacht builders to design new models around the engines.
Do 2 stroke outboards have carburetors?
In a two-stroke engine, the fuel-air mixture enters the combustion chamber via a opening in the side of the cylinder. … Initially, two-stroke engines used carburetors to control the fuel-air mixture. But carbureted outboards aren’t particularly efficient.
What does 4 stroke EFI mean?
When choosing 4 stroke outboards – depending on the horsepower range you need for your craft – one of the decisions you’ll need to make is whether you want an electronic fuel-injected (EFI) engine or a standard, carbureted 4 stroke.
What is the difference between DFI and EFI?
A close cousin of EFI is DFI. … DFI is even more efficient that EFI, resulting in more power, less waste and cleaner exhaust gases. DFI is relatively new technology but it is beginning to show up in more vehicles as the system evolves and comes down in cost. No black magic is required.
Which is better 2-stroke vs 4 stroke?
Because 2-stroke engines are designed to run at a higher RPM, they also tend to wear out faster; a 4-stroke engine is generally more durable. That being said, 2-stroke engines are more powerful. Two-stroke engines are a much simpler design, making them easier to fix.
Are 2-stroke outboards reliable?
One of the biggest things to look for when choosing an outboard motor is reliability. … Fortunately, the 2 and 4 stroke motors in today’s market are very dependable.
Why are 2-stroke engines banned?
Answer: Two-strokes left the market because they could not meet steadily-tightening EPA standards for vehicle exhaust emissions. … A four-stroke engine has a separate piston stroke for each of the four functions necessary to a spark-ignition engine: intake, compression, power, and exhaust.
Why are boat engines carbureted?
A carburetor is an important component of the correct functioning of your boat’s gas engine, whether inboard or outboard. It mixes the right amount of fuel and air for combustion, with the mix being sucked into the engine by a vacuum.
Does tohatsu make Mercury outboards?
Mercury Outboards, 30 Hp and less, are made by Tohatsu in Japan. Mercury Marine builds 40, 50 and 60 horsepower outboard motors in Suzhou, China. Mercury also manufactures engines over 75 horsepower at its facility in Fond du Lac in Wisconsin.
Do fuel injected outboards have Reeds?
Fuel injected engines suffer from leaky reeds even more than carbureted engines because the electronic control unit (ECU) injects the correct amount of fuel for a full charge of air, and has no way to recognize that air is escaping through leaky reeds, resulting in a progressively richer mixture!