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Encyclopedia > Outboard motor

Bolinder's two cylinder Trim outboard engine.
Bolinder's two cylinder Trim outboard engine.
A Mercury Marine 50 HP outboard engine, circa 1970's
A Mercury Marine 50 HP outboard engine, circa 1970's

An outboard motor is a propulsion system for smaller boats. Image File history File links Download high-resolution version (1268x1760, 380 KB) Beskrivning Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Outboard motor ... Image File history File links Download high-resolution version (1268x1760, 380 KB) Beskrivning Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Outboard motor ... Image File history File linksMetadata Download high-resolution version (1712x2288, 1595 KB) Summary Mercury Marine 50hp outboard motor circa 1970s Licensing I, the creator of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1. ... Image File history File linksMetadata Download high-resolution version (1712x2288, 1595 KB) Summary Mercury Marine 50hp outboard motor circa 1970s Licensing I, the creator of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1. ... The Brunswick Corporation (NYSE: BC), formerly known as the Brunswick-Balke-Collender Company, is a United States based corporation that has been involved in manufacturing a wide variety of products since 1845. ... Wikipedia does not yet have an article with this exact name. ... For other uses, see Boat (disambiguation). ...

Contents

General uses

Outboard motors for a boat are developed as a self-contained unit with engine, subsidiary systems, and propeller, designed to be mounted at the stern (rear) of the craft. They are the most common motorized method of propelling small watercraft. For other uses, see Boat (disambiguation). ... For other uses, see Engine (disambiguation). ... For other uses, see Propeller (disambiguation). ...


As well as providing propulsion, outboards provide steering control, as they are designed to pivot over their mountings and thus control the orientation of the propeller. The transmission leg in the water also acts as a rudder even when the propeller is not providing power. Stern-mounted steering oar of an Egyptian riverboat depicted in the Tomb of Menna (c. ...


When boats are out of service or being drawn through shallow waters, outboard motors can also be tipped forward over their mounts to elevate the propeller and transmission shaft out of the water to avoid accumulation of seaweed or hitting underwater hazards such as rocks. Ascophyllum nodosum exposed to the sun in Nova Scotia, Canada Dead Mans Fingers (Codium fragile) off Massachusetts coast For the band, see; Seaweed (band) For the rock musician, see; Seaweed (musician) Seaweeds are any of a large number of marine benthic algae. ...


Types of motors

Small outboard motors are truly self-contained, with integral fuel tanks and controls mounted on the body of the motor and steered by a "tiller" directly connected to the motor. Such small motors can weigh as little as 12 kilograms (approximately 26 pounds) and provide sufficient power to move a small dinghy at around 15 km/h (9 mph), far faster than possible with oars. They are highly portable, able to be removed by simply loosening their mounting clamps. Small outboards usually use a manual pull start ignition system while larger models often have electric start similar to a car. An oar is a tool used for Marine Propulsion. ...


Manufacturers have produced large outboard designs, with sufficient power to be used on boats as long as 9 metres (30 feet) or more. Manufacturers have also produced electric outboards. These are used for specialised applications, notably trolling for bass in the US, where their quietness and zero emissions outweigh the range deficiencies shared with electric cars. Diesel outboards are also available, but their weight and cost make them impractical for most purposes. This article or section does not cite any references or sources. ... Striped bass (Morone saxatilis) Largemouth bass (Micropterus salmoides) Bass (IPA /bæs/) is a name shared by many different species of popular game fish. ... Zero emission refers to a motor or engine that, by virtue of being powered by electricity or more exotic means, generates no by-products other than water. ... This article is about the fuel. ...


A few outboard motors have been produced with pump-jet propulsion replacing the conventional propeller. Like other types of pump-jet propulsion systems, they offer virtually no cavitation, giving the boat more maneuverability and the ability to operate in very shallow water. However, the low efficiency compared to propellers has seen them restricted to specialized applications. Categories: Marine propulsion | Stub ... Cavitating propeller model in a water tunnel experiment High speed jet of fluid impact on a fixed surface. ...


History and developments

The first practical outboard motor was created by Norwegian-American inventor Ole Evinrude in 1909. The Norwegian-Americans are an ethnic group in the United States. ... Ole Evinrude (1877 - 1934) was a U.S. inventor. ... Year 1909 (MCMIX) was a common year starting on Friday (link will display full calendar) of the Gregorian calendar (or a common year starting on Thursday of the 13-day-slower Julian calendar). ...


Historically, most outboards have used two-stroke engines fitted with a carburetor due to their simplicity (and consequent reliability), low cost, and high power-to-weight ratios - weight issues being particularly important as too much weight over the stern of boats tends to impede their handling. However, the high specific fuel consumption and high emissions associated with traditional carburated two-stroke engines has led to the development of more sophisticated engines. Most manufacturers have marketed four-stroke engines, often with computer controls, fuel injection, variable camshaft timing, multiple valves per cylinder, and supercharging. Others have focused on developing computer controlled direct-injected two stroke engines. Either of these designs can reduce fuel consumption and emissions markedly, especially at low engine speeds, albeit at the expense of greater cost and complexity. The two-stroke cycle of an internal combustion engine differs from the more common four-stroke cycle by having only two strokes (linear movements of the piston) instead of four, although the same four operations (intake, compression, power, exhaust) still occur. ... Power-to-weight ratio is a measure commonly used when comparing various vehicles (or engines), including automobiles, motorcycles and aircraft. ... The four-stroke cycle of an internal combustion engine is the cycle most commonly used for automotive and industrial purposes today (cars and trucks, generators, etc). ...


Marine engines also benefit from the ability to draw an unlimited supply of cooling water from the environment; this eliminates the need for radiators and cooling fans, lowering complexity and weight. Not to be confused with radiata. ... Household Electric Fan A fan has two purposes – to move air for creature comfort or for ventilation and to move air or gas from one location to another for industrial purposes. ...


Manufacturers

The Anzani was an Italian automobile manufactured from 1923 to 1924 by a company, founded by Alessandro Anzani. ... Osprey model British Seagull Outboard Forty Plus model British Seagull Outboard British Seagull was a British manufacturer of 2 stroke outboard engines from the early 1930s until the mid 1990s. ... Briggs & Stratton is the worlds largest manufacturer of air-cooled gasoline engines for primarily outdoor power equipment. ... Evinrude Outboard Motors is a maker of outboard boat motors, and was founded by Ole Evinrude. ... Johnson Outboards is a maker of outboard boat motors. ... Bombardier BR180 snowcat pulling snowmobile trail groomer attachment Bombardier Recreational Products or BRP is a Canadian company, that traces its roots back to the year 1942 when Joseph-Armand Bombardier founded LAuto-Neige Bombardier Limitée in Valcourt in the Eastern Townships, Quebec. ... This article is about the Japanese motor corporation. ... The Brunswick Corporation (NYSE: BC), formerly known as the Brunswick-Balke-Collender Company, is a United States based corporation that has been involved in manufacturing a wide variety of products since 1845. ... The Brunswick Corporation (NYSE: BC), formerly known as the Brunswick-Balke-Collender Company, is a United States based corporation that has been involved in manufacturing a wide variety of products since 1845. ... For other uses, see Suzuki (disambiguation). ... Tohatsu Corporation of Tokyo, Japan, was founded in 1932. ... Yamaha Motor Corporation (ヤマハ発動機株式会社) is a motorized vehicle-producing company, initially part of the Yamaha Corporation. ...

See also

An inboard motor is a marine propulsion system for boats. ... Main article: Compressed air energy An air engine or air motor is a device for converting potential energy from compressed air into kinetic energy to drive other machines. ... This article is about the fuel. ... The sterndrive, or stern drive, is also called inboard/outboard (I/O), and is a form of marine propulsion. ... A luxury yacht tender is used to service and to provide support and entertainment to a private or charter luxury yacht. ...

External links

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  Results from FactBites:
 
outboard motor - definition of outboard motor in Encyclopedia (381 words)
An outboard motor is a propulsion system for a boat developed as a self-contained unit with engine, subsidiary systems, and propeller, designed to be mounted at the stern (rear) of the craft.
Small outboard motors are truly self-contained, with integral fuel tanks and controls mounted on the body of the motor and steered by a "tiller" directly connected to the motor.
Electric outboards are used for specialised applications, notably trolling for bass in the US, where their quietness and zero emissions (or, more accurately, displaced emissions) outweigh the range deficiencies shared with electric cars.
  More results at FactBites »

 

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