Page. Insider - Information about all domains. Outboard motor - Wikipedia. Basic parts of an outboard motor. 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 motorized method of propelling small watercraft. As well as providing propulsion, outboards provide steering control, as they are designed to pivot over their mountings and thus control the direction of thrust. The skeg also acts as a rudder when the engine is not running. Unlike inboard motors, outboard motors can be easily removed for storage or repairs. This helps when traveling through shallow waters where there may be debris that could potentially damage the motor as well as the propeller. If the electric motor required to move the pistons which raise or lower the engine is malfunctioning, every outboard motor is equipped with a manual piston release which will allow the operator to drop the motor down to its lowest setting. These range from 2- , 3- and 4- cylinder models generating 1. Assistant Chief Suzanne Crawford joined the Boynton Beach Police Department in December 1996. She has served as a road patrol officer, field training officer, traffic. PicoTrace is a spin-off company, founded by members of the Faculty of Geosciences of the University of Göttingen, Germany. Our University has a well known tradition. With its rich collections and international scope, the Library. Home Contact Terms Privacy. V6 and V8 cylinder blocks rated up to 5. W).. They are affixed to the boat via clamps, and thus easily moved from boat to boat. These motors typically use a manual start system, with throttle and gearshift controls mounted on the body of the motor, and a tiller for steering. The smallest of these weigh as little as 1. This type of motor is typically used: to power small craft such as jon boats, dinghies, canoes, etc. In this application, the motor is frequently installed on the transom alongside and connected to the primary outboard to enable helm steering. Great Lakes Fishing Boats for Sale. Sell your boat fast at www.walleye.com. In addition many small motor manufacturers have begun offering variants with power trim/tilt and electric starting functions so that they may be completely controlled remotely. Electric- powered. Although less efficient than an open propeller, they are particularly useful in applications where the ability to operate in very shallow water is important. They also eliminate the laceration dangers of an open propeller. The Central Motor Vehicles Rules, 1989, Indian Bare Acts at Vakilno1.com, a website for Indian Laws and bareacts, legal advice and law documents in India. History and developments. His Evinrude Outboard Co. The 1. 92. 0s were the first high- water mark for the outboard with Evinrude, Johnson, ELTO, Atwater Lockwood and dozens of other makers in the field. Historically, a majority of outboards have been two- stroke powerheads fitted with a carburetor due to the design's inherent simplicity, reliability, low cost and light weight. Drawbacks include increased pollution, due to the high volume of unburned gasoline and oil in their exhaust, and louder noise. Four stroke outboards. In movie history, the Ford Mustang fastback has traditionally been the hero The Coast Guard was transferred to the Navy Department by executive order 8929 on November 1, 1941. In actuality, certain units of the Coast Guard had been under Navy. Manage your page to keep your users updated View some of our premium pages: google.com. Upgrade to a Premium Page. NEXT SALE: STONDON HALL SALE 27TH MARCH 2017. We send out the sale results notifications in the form of a newsletter within 14 days of the. This was called the Bearcat that was later purchased by Fischer- Pierce who are the makers of Boston Whaler for use in their boats because of their technical superiority and efficiency over two strokes. In the early 1. 98. Honda Motor Co. These motors were only available in the smaller horsepower range. In 1. 99. 0 Honda released 3. They continued to lead in the development of four- stroke engines throughout the 1. US and European exhaust emissions regulations such as CARB (California Air Resources Board) led to the proliferation of four- stroke outboards. At first, North American manufacturers such as Mercury and OMC used engine technology from Japanese manufacturers such as Yamaha and Suzuki until they were able to develop their own four- stroke engine. The inherent advantages of four- stroke motors included: lower pollution (especially oil in the water), noise reduction, increase fuel economy, increased low end torque, and smoother operation. Honda Marine Group, Mercury Marine, Mercury Racing, Nissan Marine, Suzuki Marine, Tohatsu Outboards, Yamaha Marine, and China Oshen- Hyfong marine have all developed new four- stroke engines. Some are carburetted, usually the smaller engines. The balance are electronically fuel- injected. Depending on the manufacturer, newer engines benefit from advanced technology such as multiple valves per cylinder, variable camshaft timing (Honda's VTEC), boosted low end torque (Honda's BLAST), 3- way cooling systems, and closed loop fuel injection. Mercury Verado four- strokes are unique in that they are supercharged. Mercury Marine, Mercury Racing, Tohatsu, Yamaha Marine, Nissan and Evinrude each developed computer- controlled direct- injected two- stroke engines. Each brand boasts a different method of DI. Fuel economy on both direct injected and four- stroke outboards measures from a 1. Depending on rpm and load at cruising speeds, figure on about a 3. Boats built in the U. S. A motor with less than 7. Shaft length. If the shaft is too long it will extend farther into the water than necessary creating drag, which will impair performance and fuel economy. If the shaft is too short, the motor will be prone to ventilation. Even worse, if the water intake ports on the lower unit are not sufficiently submerged, engine overheating is likely, which can result in severe damage. General Dimensions. The motor should be as high as possible without ventilating or loss of water pressure. This minimizes the effect of hydrodynamic drag while underway, allowing for greater speed. Generally, the antiventilation plate should be about the same height as, or up to two inches higher than, the keel, with the motor in neutral trim. Trim is the angle of the motor in relation to the hull, as illustrated below. The ideal trim angle is the one in which the boat rides level, with most of the hull on the surface instead of plowing through the water. If the motor is trimmed out too far, the bow will ride too high in the water. With too little trim, the bow rides too low. The optimal trim setting will vary depending on many factors including speed, hull design, weight and balance, and conditions on the water (wind and waves). Many large outboards are equipped with power trim, an electric motor on the mounting bracket, with a switch at the helm that enables the operator to adjust the trim angle on the fly. In this case, the motor should be trimmed fully in to start, and trimmed out (with an eye on the tachometer) as the boat gains momentum, until it reaches the point just before ventilation begins or further trim adjustment results in an RPM increase with no increase in speed. Motors not equipped with power trim are manually adjustable using a pin called a topper tilt lock. Ventilation. With the propeller pushing mostly air instead of water, the load on the engine is greatly reduced, causing the engine to race and the propeller to spin fast enough to result in cavitation, at which point little thrust is generated at all. The condition continues until the prop slows enough for the air bubbles to rise to the surface. A safety measure is a . This design has remained the standard due mainly to the efficiency and simplicity of its design. One disadvantage to this system is that if the impeller is run dry for a length of time (such as leaving the engine running when pulling the boat out of the water or in some cases tilting the engine out of the water while running), the impeller is likely to be ruined in the process. Air cooled outboards. Outboard engines made by Briggs & Stratton are air- cooled. This means saltwater is not pumped through the engine block as is the case with most outboards but still has to be pumped through the heat exchanger. Other Outboard Motoring Method. Design probably adapted decades ago from predecessors of Kohler Long tail Outboard Motor. In Vietnam and perhaps other parts of South East Asia such as Thailand, designs perhaps adapted from the predecessors of one such as this Kohler Long Tail. In Vietnam, they are called . The outboard motors, which can be smallish air- cooled or water- cooled gasoline, diesel or even modified automotive engines, are bolted to a welded steel tube frame, with another long steel tube up to 3 m long to hold the drive shaft, driving a conventional looking propeller. The frame that holds the motor has a short, swiveling steel pin/tube approximately 1. The pivoting design allows the outboard motor to be swiveled by the operator in almost all directions: Sideways for direction, up and down to change the thrust line according to speed or bow lift, elevate completely out of water for easy starting, placing the drive shaft and the propeller forward along the side of the boat for reverse, or put them inside the boat for propeller replacement, which can be a regular occurrence to the cheap cast aluminum propellers on the often debris- prone inland waterways. This design is utilized to propel Long- tail boats. Manufacturers. Retrieved 9 February 2. Retrieved 7 June 2. Retrieved 1. 4 February 2. Retrieved 1. 4 February 2. Retrieved 1. 7 September 2. Retrieved 1 August 2. Retrieved 1. 5 June 2. Retrieved 1. 7 September 2. Retrieved 1. 7 September 2. Retrieved 1. 7 September 2. Retrieved 1. 7 September 2. Retrieved 1. 7 September 2. Retrieved 1. 7 September 2. Share photos and videos on Twitter.
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