Very often, outdoor enthusiasts - fishermen, hunters or just tourists - while overcoming water barriers, face the problem that their motor boat is not able to cross shallow water or areas densely overgrown with swamp vegetation. To solve such problems, a special device called a boat swamp was created.
Design Features
The outboard motor of the swamp is an air-cooled engine that is attached to the rear side of the boat. This outboard motor is equipped with a long inclined shaft with a semi-immersed propeller. The driving and working shaft are located on different axes at a certain angle. The value of this angle varies depending on the height of the stern transom of the boat. This design allows you to make the working shaft shorter, which makes the motor smaller, lighter, which simplifies its transportation and, if necessary, relocation from one boat to another.
The propeller shaft of the swamp boat boat is sealed with double cuffs. This protects the lubricating compositions from the effects of adverse environmental factors, prevents water from penetrating the transmission units, thereby increasing the reliability and service life of the transmission bearings.
The motor is equipped with a silencer that does not allow exhaust gases to be discharged into the water. A separate lubrication system reduces pollution. All this indicates the conformity of the boat swamp to the international level of environmental standards.
The shaft is designed in such a way that during operation provides self-centering and damps vibrations. This allows you to significantly reduce the level of vibration and minimizes lateral loads on rotating parts. This significantly increases the life of the engine and makes it comfortable for users.
Engine features
The design of the outboard boat swamp will significantly increase patency in the thickets and in shallow water. For free movement, just a few centimeters of water under the bottom are enough. The device and the appearance of the screw do not allow it to cling to various obstacles. By adjusting the angle of attack of the screw, you can move in shallow water, only half immersing it in water.
Vertical plates along the shaft, called blades or fins, when meeting with various obstacles, divert them from the screw. The screw form eliminates the possibility of winding seaweed or fishing gear on it. This design is very effective when moving on silt or dirt. Air cooling allows you to operate this engine on a variety of surfaces up to solid soil.
Overview of alligator swamps
One of the most popular domestic boat swamps are Alligator engines. They are lightweight, comfortable, unpretentious and reliable. Moreover, their cost is much lower than their foreign counterparts.
They lack gear and reverse. Torque is transmitted to the screw shaft via a timing belt. The strong steel screw withstands heavy impacts against obstacles, protecting the engine from damage. All this increases the service life of the product.
The air cooling system eliminates the ingress of sludge, sand or algae into the pump. The material for the manufacture of the screw is durable stainless steel. Alligator motors have proven their best when installed on flat-bottomed boats.
Swamps MRS
Another popular domestic development is the MRS series of outboard boat swamps manufactured by Bulatocka. It includes motors with a capacity of 7, 9, 16, 20 and 24 horsepower, which allows users to choose the most suitable option depending on operating conditions.
The vibration and vibration damping system of the engine, the shaft and axles made of anticorrosive steel, and the increased safety margin of the bearings make this product reliable in operation and significantly extend its service life. The fuel for such engines is A-92 gasoline, its consumption depends on engine power.