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Headquarters A Mercury 50 HP outboard motor circa 1980 Six cylinder two-stroke engine in 1984. Mercury Marine is a marine engine ... and produced 90 horsepower from ...
In 1994, Suzuki unveiled the first of their four-stroke outboard motors, the DF9.9 and DF15.. The company subsequently released the DF60 (which featured an electronic fuel injection system) in 1997, and the DF300 in 2006 being the industry’s first 300HP V6 4-stroke outboard. In 2017, Suzuki Marine debuted the DF350A outboard motor, under the ...
In 1990 Honda released 35 hp and 45 hp four-stroke models. They continued to lead in the development of four-stroke engines throughout the 1990s as US and European exhaust emissions regulations such as CARB (California Air Resources Board) led to the proliferation of four-stroke outboards. At first, North American manufacturers such as Mercury ...
Typical airflow in a four-stroke engine: In stroke #1, the pistons suck in (aspirate) air to the combustion chamber through the opened inlet valve.. A naturally aspirated engine, also known as a normally aspirated engine, and abbreviated to N/A or NA, is an internal combustion engine in which air intake depends solely on atmospheric pressure and does not have forced induction through a ...
Bore and stroke size is 3.552 in × 4.165 in (90.2 mm × 105.8 mm), identical to the 5.4 L V8. Both 2-valve and 3-valve versions have been produced. The 6.8 L uses a split-pin crank with 72° firing intervals and a balance shaft gear driven by the left camshaft to quell vibrations inherent to a 90° bank angle V10 engine. The engine's firing ...
Produced from 1958 through 1960, it was only used in Mercury vehicles. It used a 4.30 in × 3.30 in (109.2 mm × 83.8 mm) bore and stroke. Output began at 312 or 330 hp (233 or 246 kW), both with a four-barrel carburetor. The 322 hp (240 kW) was the only output for 1959, and power dropped to 280 hp (209 kW) for the final year.