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An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom. They are the most common motorised method of propelling small watercraft.
British Seagull was a British manufacturer of simple and rugged two-stroke marine outboard motors, produced from the late 1930s until the mid-1990s. Originally based in Wolverhampton, the company moved to Poole, Dorset, a centre for boating and yachting. Seagull engines were utilitarian outboards with a relatively slow-turning prop.
[when?] [5] The "Verado" system integrates the outboard into an entire system, including "fly-by-wire" steering and advanced diagnostics. Verado engines are available in 250 hp and 300 hp (V8), 350 hp and 400 hp (V10, introduced in 2022), and 600 hp (V12) as of early 2021. In 2007 Mercury Marine began selling its Zeus drive system. [6]
Typically in smaller (less than 10 hp or 7.5 kW) and older engines, a narrow shear pin through the drive shaft and propeller hub transmits the power of the engine at normal loads. The pin is designed to shear when the propeller is put under a load that could damage the engine.
Other vessels may have twin, triple or quadruple screws. Power is transmitted from the engine to the screw by way of a propeller shaft, which may be connected to a gearbox. The propeller then moves the vessel by creating thrust. When the propeller rotates the pressure in front of the propeller is lower than the pressure behind the propeller.
Another bike that was performance-oriented was the Yamaha RX-Z, introduced in 1985 as a two-stroke naked sport bike, related to the Yamaha RX-135 and Yamaha RD-135, borrowing its chassis and platform. Originally equipped with a five speed transmission and a solid front disc brake rotor with rear drum brakes, it was popular in Malaysia and ...