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The outboard hulls of a trimaran.

Related Terms

INBOARD MOTOR

An engine mounted within the hull of a vessel, usually driving a fixed propeller by a shaft protruding through the stern. Generally used on larger vessels. See also stern drive and outboard motor.

FIXED PROPELLER

A propeller mounted on a rigid shaft protruding from the hull of a vessel, usually driven by an inboard motor; steering must be done using a rudder. See also outboard motor and sterndrive.

STERNDRIVE

A propeller drive system similar to the lower part of an outboard motor extending below the hull of a larger power boat or yacht, but driven by an engine mounted within the hull. Unlike a fixed propeller (but like an outboard), the boat may be steered by twisting the drive.

DECK STRINGER

The strake of deck plating that runs along the outboard edge of a deck

OUTBOARD

Away from, the centerline towards the side; outside the hull

SPECTACLE FRAME

A large casting extending outboard from the main hull for supporting for the ends of the propeller shafts in a multi-screw ship

STRINGER

A fore-and-aft girder running along the side of a ship at the shell and also to the outboard strake of plating on any deck

AUXILIARY ENGINE

An engine, outboard or inboard, used to power a sailboat.

FUEL/OIL RATIO

The mix of fuel and oil which is used in most two stroke outboard engines.

FLUSHING PLUG

A fitting at the lower unit of an outboard motor to enable a hose to be attached for flushing the cooling system.

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