Inboard motor

Inboard motor

An inboard motor is a marine propulsion system for boats. As opposed to an outboard motor where an engine is mounted outside of the hull of the craft, an "inboard motor" is an engine enclosed within the hull of the boat, usually connected to a propulsion screw by a driveshaft.

izes

Inboard motors may be of several types, suitable for the size of craft they are fitted to.

mall craft

For pleasure craft, such as sailboats and speedboats, both diesel and gasoline engines are used. Many inboard motors are derivatives of automobile engines, known as marine automobile engines.

Large craft

For larger craft, including ships (where outboard propulsion would in any case not be suitable) the propulsion system may include many types, such as diesel, gas turbine, or even fossil-fuel or nuclear generated steam.

Cooling

Some inboard motors are freshwater cooled, using a traditional radiator, while others have a raw water cooling system where water from the lake, river or sea is pumped by the engine to cool it. As salt water is corrosive, and would damage the engine, seagoing craft are indirectly cooled via a heat exchanger.



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  • inboard motor — UK [ˌɪnbɔː(r)d ˈməʊtə(r)] US [ˌɪnbɔrd ˈmoʊtər] noun [countable] [singular inboard motor plural inboard motors] a motor that is fitted inside a boat …   Useful english dictionary

  • inboard motor — UK [ˌɪnbɔː(r)d ˈməʊtə(r)] / US [ˌɪnbɔrd ˈmoʊtər] noun [countable] Word forms inboard motor : singular inboard motor plural inboard motors a motor that is fitted inside a boat See: outboard motor …   English dictionary

  • inboard motor — An engine which is located within a boat rather than being attached to the back (outboard motor) …   Dictionary of automotive terms

  • inboard — /in bawrd , bohrd /, adj. 1. located nearer the longitudinal axis or center, as of an airplane: the inboard section of a wing. 2. located inside a hull or aircraft: a motorboat with an inboard engine. 3. (of a motorboat) having the motor inboard …   Universalium

  • inboard — I. adverb Date: 1830 1. inside the line of a ship s bulwarks or hull 2. toward the center line of a vehicle or craft (as a ship or aircraft) II. adjective Date: 1847 1. located inboard < an inboard engine > < an inboard spoiler …   New Collegiate Dictionary

  • motor — [1] An electrically driven power unit (electric motor). This term is often incorrectly (but commonly) applied to an internal combustion engine. [2] Rotating machine that transforms fluid or electric energy into a mechanical motion. [3] An engine… …   Dictionary of automotive terms

  • inboard — in|board [ˈınbo:d US bo:rd] adj inside a boat inboard motor/engine →↑outboard motor …   Dictionary of contemporary English

  • motor sailer — noun : a motorboat with sailing equipment * * * Naut. a yacht having sails and an engine as an alternative or auxiliary means of propulsion. [1930 35] * * * motor sailer, a sailboat with a motor, usually an inboard motor …   Useful english dictionary

  • inboard — [[t]ɪ̱nbɔː(r)d[/t]] ADJ: ADJ n An inboard motor or engine is inside a boat rather than attached to the outside. Ant: outboard …   English dictionary

  • inboard — [in′bôrd΄] adv., adj. [< in board: see BOARD] 1. inside the hull or bulwarks of, or toward the center of, a ship or boat 2. close or closer to the fuselage or hull of an aircraft 3. Mech. toward the inside n. a boat with the motor mounted… …   English World dictionary

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