Bolinder's two cylinder Trim outboard engine.

A Mercury Marine 50 HP outboard engine, circa 1970's

An outboard motor is a propulsion system for 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. ... A boat is a structure designed to float on, and provide transport over water. ...

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 method of propelling small watercraft. A boat is a structure designed to float on, and provide transport over water. ... An engine is something that produces some effect from a given input. ... To meet Wikipedias quality standards, this article or section may require cleanup. ...

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. The worlds oldest depiction of a rudder. ...

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. Seaweed-covered rocks in the UK Biologists, specifically marine biologists, consider seaweed to be any of a large number of marine benthic algae that are multicellular, macrothallic, and thus differentiated from most algae that tend to be microscopic in size [1]. Many phycologists prefer the term marine macroalgae over seaweeds...

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. 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 makes them impractical for most purposes. This article or section needs a complete rewrite for the reasons listed on the talk page. ... Largemouth Bass 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. ... Diesel or diesel fuel is a specific fractional distillate of fuel oil (mostly petroleum) that is used as fuel in a diesel engine invented by German engineer Rudolf Diesel. ...

In addition, outboards are offered with both traditional propeller and jet drive designs, the propeller design being more popular. Small outboards usually use a manual pull start ignition system while larger models often have electric start similar to a car.

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. ... 1909 (MCMIX) was a common year starting on Friday (see link for calendar). ...

Historically, most outboards have used two-stroke cycle engines 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 emissions, and thus both environmental concerns and the cost of technology to meet emissions standards, has led to the gradual gain in popularity of four-stroke cycle outboards, particularly for lower-end machines. High-end outboards have tended to remain two-stroke designs, as the fuel injection technology required to meet the emissions standards and fuel economy targets costs proportionally less for these motors and weight issues are more important. 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 their proximity to an endless supply of cold water by using it once for cooling and then ejecting the now-heated water. This allows marine engines to avoid the cost and weight of radiators and cooling fans normally associated with land-based engines. This article discusses radiators in automobiles, buildings, and electronics. ... 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

• British Anzani
• British Seagull
• Evinrude/Johnson, a division of Bombardier Recreational Products
• Honda
• Mercury/Mariner
• Nissan
• Suzuki
• Tohatsu
• Yamaha Motor Corporation
• Yanmar Diesel Power

Osprey model British Seagull Outboard Forty Plus model British Seagull Outboard British Seagull manufactured 2 stroke outboard engines from the early 1930s until the mid 1990s. ... 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 Recreational Products or BRP is a Canadian company, which was founded by Joseph-Armand Bombardier as LAuto-Neige Bombardier Limitée in 1942 at Valcourt in the Eastern Townships, Quebec. ... For other uses, see Honda (disambiguation). ... 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. ... Nissan Motor Co. ... Suzuki Motor Corporation (スズキ株式会社) TYO: 7269 is a Japanese manufacturing company producing a range of small automobiles (especially Keicars), a full range of motorcycles, outboard motors, and a variety of other small combustion-powered engine products. ... Tohatsu is produced by Tohatsu Corporation of Tokyo, Japan. ... 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

• Sterndrive
• Luxury yacht tenders

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. ...

Patents

• U.S. Patent 1001260 - Marine propulsion mechanism
• U.S. Patent 1011930 - Canoe and other small craft

External links

• British Anzani
• Antique Outboard Motor Club
• Scream And Fly Magazine