seawalkermarine.com 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. 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. An inflatable boat is a lightweight boat constructed with its sides and bow made of flexible tubes containing pressurised gas. For smaller boats, the floor and hull are often flexible, while for boats longer than 3 metres (9.8 ft), the floor typically consists of three to five rigid plywood or aluminium sheets fixed between the tubes, but not joined rigidly together. Often the transom is rigid, providing a location and structure for mounting an outboard motor. Some inflatable boats can be disassembled and packed into a small volume so that they can be easily stored and transported. The boat, when inflated, is kept rigid crossways by a foldable removable thwart. This feature makes these boats suitable for liferafts for larger boats or aircraft, and for travel or recreational purposes. 2 stroke outboard engine produces the suction and compression strokes of the piston in a single action. In the same way, the expansion and exhaust strokes also occur. The expansion stroke is the stage that produces the power that drives the engine. The suction, compression, expansion, and exhaust occur in two ‘strokes’ of the piston; thus, the engine gets dubbed as ‘two-stroke.’2 Stroke Outboard Motor has been known for its fast acceleration, portability, smaller size and lighter weight. In 2-stroke motors, oil is blended with gasoline. As the fuel goes through the engine, it consumes small amounts of oil for lubrication. Therefore, oil changes are not required to power the engine because the oil is continuously injected. The customer simply maintains an oil reservoir either located in the boat or on the engine. 4 stroke board engine creates the four stages, suction, compression, expansion and exhaust. However, in a four-stroke outboard, these four stages are distributed in four strokes of the piston, thus making it a four-stroke engine. 4 stroke motor has been known for its power, low emissions, fuel mileage, lower sound level and how smooth it runs. In 4-stroke motors, there is an oil filter and self-contained oil cavity within the engine, similar to the way it works in a car. An oil change is typically required after 100 hours or one year of use. An inflatable fishing boat is a lightweight boat whose sides are built of a flexible swollen tube and its bows (forward parts). The tubes consist of rubberized synthetic materials such as polyurethane and PVC. These tubes are buoyant and cheaper than conventional vessels. The transom of a swimming boat (the back of the boat) can be rigid and can be installed as an outboard motor. Based on the size and function of the boat, the flooring of inflatable boats can vary. Roll-up floors, hard floors, and air floors are the three types. A rigid inflatable boat (RIB Boat), also rigid-hull inflatable boat or rigid-hulled inflatable boat (RHIB), is a lightweight but high-performance and high-capacity unsinkable boat constructed with a rigid hull bottom joined to side-forming air tubes that are inflated with air to high pressure so as to give the sides resilient rigidity along the boat's topsides. The design is stable, light, fast and seaworthy. The inflated collar acts as a life jacket, ensuring that the vessel retains its buoyancy, even if the boat is taking on water. The RIB is an evolutionary development of the inflatable boat with a rubberized fabric bottom that is stiffened with flat boards within the collar to form the deck or floor of the boat. An inflatable raft is a type of boat that floats when filled with air. There are many different types of inflatable rafts, which are designed for different uses. They are usually made of plastic or plastic-coated fabric. They have multiple chambers that are filled with air. Depending on the type of raft, this can be done by blowing into a valve, using a manually operated or electric pump, or an air compressor. Inflatable rafts are lighter, cheaper and easier to store and transport than conventional boats, which makes them a popular choice for recreation, rescue and other purposes. Fiberglass boats are boats made of a material known as glass-reinforced plastic. This material is today commonly known as fiberglass. It is material made from extremely fine fibers of glass, being interwoven into another material. In the case of watercraft, this is more often than not some type of plastic. Fiberglass as a boat material usually resembles a form of cloth until it dries. The main reason for the popularity of fiberglass boats is due to the durability of fiberglass. Unlike wooden boats or metal boats, fiberglass boats will not rot or rust. Therefore, their life expectancies far exceed these traditional materials used in boat construction. Further, fiberglass boats are usually lighter weight and stiffer than boats made from other types of materials. There are also various kinds of spare parts for outboard motors including gaskets, seals, bearings, CDI units, pistons, carburetor, reeds, rods, ignition parts, stators, carburetor kits, cooling parts, lower unit gears, water pumps and so on.