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Outboards & Inboards

Use the drop down menu under Engines Drives Controls to select information.

Inboard Engines

An inboard motor is an engine enclosed within the hull of the boat. An inboard motor can be connected by a driveshaft to a propeller or by a combined unit known as a stern drive.

Many marine engines are derived from automotive and truck engines. An inboard engine is selected by horsepower rating and fuel type, diesel is usually specified by the professional sector.

Outboard Engines

An outboard motor is a self-contained unit that includes engine, gearbox and propeller. Outboards are designed to allow multiple engines to be bolted to the transom of a boat.

As well as providing propulsion an outboard motor provides very precise steering. Outboards are designed to pivot and rapidly change the direction of propeller thrust.

Under Powered & Over Powered Engines

Using an engine that is too small for a particular craft is known as "under powering". This often results in a boat that is incapable of performing in the role for which it was acquired.

Using an engine that is too large for a particular craft is known as "over powering". Over powering can lead to a boat that is difficult to control and potentially dangerous.

18.06.2018
Facing the Challenges of Future Marine Power

In April 2018 we organised the NEXT GENERATION Marine Power…

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11.06.2018
How Can Marine Sectors Finance Hybrid Power

Ports and the offshore industry are now recognising the potential of…

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NMIOTC Annual Conference

Dates:
5 - 7 June 2018
Location:
Crete, Greece

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America's Cup AC75

AC75 is the new class of high performance fully foiling monohull racing yachts, to be sailed when New Zealand defend…

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Shock Mitigation