Outboard boat motors are developed as self-containing units with an engine, subsidiary systems, and a propeller, designed to be mounted at the rear of the marine craft or boat. Outboard motors are the most common motorized method of propelling small watercrafts and are notoriously unreliable when compared to most mechanical contrivances.
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.
When boats are out of service or being drawn through shallow waters, outboard motors can also be tipped forward trimmed up 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 dead trees, rocks, or other submerged objects.
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OEM EVINRUDE 150200225250 hp OUTBOARD BOAT MOTOR LOWER UNIT REMAN WARRANTY
Sale Price: US $895.00 |
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MERCURY MARINE 90ELPTO 1 090412FY 90 HP BOAT OUTBOARD MOTOR
Sale Price: US $6,495.00 |
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MERCURY 90 HP OUTBOARD BOAT MOTOR TOP COWLING
Sale Price: US $352.95 |
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. Small outboards usually use a manual pull start ignition system while larger models often have electric start similar to a car.
Manufacturers have produced large outboard motor designs, with sufficient power to be used on boats as long as 9 metres (30 feet) or more. Manufacturers have also produced electric outboard motors. These are used for specialized applications, notably trolling for bass in the US, where their quietness and zero emissions outweigh the range deficiencies shared with electric cars. Diesel outboard motor are also available, but their weight and cost make them impractical for most purposes.
A few outboard motors have been produced with pump-jet propulsion replacing the conventional propeller. Like other types of pump-jet propulsion systems, they offer virtually no cavitation, giving the boat more maneuverability and the ability to operate in very shallow water. However, the low efficiency compared to propellers has seen them restricted to specialized applications.
Outboard Boat Motor Auctions on ebay
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OEM EVINRUDE 150200225250 hp OUTBOARD BOAT MOTOR LOWER UNIT REMAN WARRANTY
Sale Price: US $895.00 |
|
MERCURY MARINE 90ELPTO 1 090412FY 90 HP BOAT OUTBOARD MOTOR
Sale Price: US $6,495.00 |
|
MERCURY 90 HP OUTBOARD BOAT MOTOR TOP COWLING
Sale Price: US $352.95 |
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15 HP Yamaha Outboard Boat Motor 4 Stroke F15CMSH NEW
Sale Price: US $2,740.00 |
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SPIRIT MARINE OUTBOARD BOAT MOTOR CONTROL BOX W CABLES 20 25 HP ELECTRIC START
Sale Price: US $199.99 |
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