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Tohatsu four stroke outboard engines above 50 HP sold in North America after 2013 are rebadged Honda, though at some point after that Tohatsu introduced their own 60 HP model which is an up-rated variant of their 40/50 HP engine. As of at least 2022 all outboards up to 60 HP are designed and built by Tohatsu. [14]
Nissan outboard motors are produced by Tohatsu Corporation of Tokyo, Japan. They are the second largest producer of outboard motors in the world and produce environmentally conscious TLDI series of two-stroke low pressure direct injection outboards that meet current United States Environmental Protection Agency regulations for the US.
Mercury Marine, Mercury Racing, Tohatsu, Yamaha Marine, Nissan and Evinrude each developed computer-controlled direct-injected two-stroke engines. Each brand boasts a different method of DI. Fuel economy on both direct-injected and four-stroke outboards measures from a 10 percent to 80 percent improvement compared with conventional two-strokes.
The M4+2 engine, also known as the double-piston internal combustion engine, is a type of internal combustion engine invented by Polish patent holder Piotr Mężyk. [1] The M4+2 engine took its name from a combination of two-stroke engines and four-stroke engines. The two-stroke combustion engine is characterized by a simple construction and ...
Yamaha developed a number of naturally-aspirated racing engines during their time in Formula One; between 1989 and 1997. They initially supplied engines for the Zakspeed team, in 1991 for the Brabham BT60Y, in 1992 for the Jordan 192, from 1993 to 1996 for Tyrrell, and in 1997 for the Arrows A18.
A six-stroke engine is one of several alternative internal combustion engine designs that attempt to improve on traditional two-stroke and four-stroke engines. Claimed advantages may include increased fuel efficiency , reduced mechanical complexity, and/or reduced emissions .
A stroke is the action of a piston travelling the full length of its cylinder.In a two-stroke engine, one of the two strokes combines primarily the intake stroke and the combustion stroke, while the other stroke primarily combines the compression stroke and the exhaust stroke, though technically since both ports are exposed during both the combustion and compression strokes, some reversion ...
Both motorcycles have a 779 cc inline-four engine, derived from the 998 cc FZ1 engine, [4] but with a bore reduced from 77 to 68 mm (3.0 to 2.7 in), and the same stroke of 53.6 mm (2.11 in). Other differences from the FZ1 engine include a lighter crankshaft, smaller valves and revised camshaft profiles. [4]