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A skeg (or skegg or skag) is a sternward extension of the keel of boats and ships which have a rudder mounted on the centre line. [1] The term also applies to the lowest point on an outboard motor or the outdrive of an inboard/outboard.
An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom. They are the most common motorised method of propelling small watercraft.
The outdrive resembles the bottom half of an outboard motor and is composed of two sub-units: an upper containing a driveshaft connected through the transom to an engine which transmits power to a 90-degree-angle gearbox; and the lower containing a vertical driveshaft receiving power from the upper unit gearbox, transmitted through another 90 ...
Although that standard stern transom is typically vertical, they may be raked such that there is an overhang above the water, as at the bow. A reverse transom is angled from the waterline forwards. [3] On smaller boats such as dinghies, transoms may be used to support a rudder, outboard motor, or a wind-generator pole.
This new driveshaft housing was three inches shorter which in turn lowered the motor's center of gravity on the boat which helped turning ability, reduced the strain on the boat's transom and motor's clamp brackets, and decreased underwater drag while increasing top speed as less gearcase was below the boat.
Outboard power on a stern bracket (or a small Atomic 2 gasoline engine of 7 hp) was the choice at one point; then diesels came in. Production of both types of O'Day 25s together totaled over 2,800 between 1975 and 1983, right at the peak of the Golden Age of sailboat sales in this size range.
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