Each lawn mower model is equipped with the right parts. Practically the most important of these is the engine. Manufacturers install different engines on lawn mowers. The price of the product depends on the type of motor. The site owner must know information about the types of engines, as well as which one is preferable for certain jobs. It will be useful to have knowledge of how to replace the engine.

Engine types

Motors are classified into two types:

  • Electric motor for lawn mower;
  • Gas engine.

On a note. Each of them has its own characteristics. Both types of power units, which are suitable for lawn mowers, can also be used for motor boats, snow plows, chainsaws, etc.

Electric motor for lawn mower

Electric motor

This motor is the most economical. Its cost is less than gasoline. Such a device works from the network. Therefore, it is suitable for gardening in a small area and only near a house or a shed where there is an outlet. The shops also sell an electric motor for a lawn mower with a battery. It allows you to cut the grass in any places far from the cottage. However, battery models are expensive and take a long time to charge.

In small-scale mechanization facilities with and without a battery, an electric motor is a system in which electricity is converted into mechanical power. Due to this, the knives that cut the plants are put into operation. But first, the mechanical energy drives the shaft, which in turn drives the blade.

There are two types of electric lawn mower motor:

  • Synchronous;
  • Asynchronous.

Synchronous

On a note!The principle of operation of a synchronous motor is a strict hit of the rotor in a traveling wave of a magnetic field, which is observed in a squirrel cage (another name for a stator). As a result, the speeds of the magnetic field and the rotor are the same.

The synchronous engine is powerful. The engine power in such devices is more than 1000 W. This follows from the fact that the design of this motor is more complex than in an asynchronous installation. The rotor, so that it can rotate along with the magnetic field, is equipped with a single-phase winding. The winding has a constant current. In addition, the device has sliding contacts. During operation, such an engine functions stably and does not reduce speed even if the received load is as high as possible.

The shaft for a lawnmower with a synchronous motor is vertical. It interacts with another shaft on which the knife is attached. The device is quite complex. There is a belt that carries out the belt transmission of mechanical energy.

Additional Information. At startup, the synchronous unit first starts working asynchronously, after which it is rebuilt to its rigid mechanical characteristic.

Asynchronous

An asynchronous motor, in comparison with a synchronous one, is a simpler device. The rotor also generates mechanical energy, which it transfers to the shaft. However, its rotation is independent of and unrelated to the magnetic field. He is as if in prostration. Moreover, its rotation speed is inferior to the speed of the magnetic field. The work directly depends on the proposed load. The power and efficiency of an asynchronous device is lower than that of a synchronous device.

Asynchronous

However, it is these engines that are produced and installed on various useful machines most often. The asynchronous motor for the vertical shaft lawn mower does not have any additional components.The grass mowing blades are attached directly to the rotating motor shaft.

Gas engine

On a note!Gasoline engines are more powerful than electric ones. Plus they are mobile. You can cut the lawn in the most remote areas of the garden from the dacha. They can work for a long time without interruption. However, the cost of such units is high relative to electrical devices. In addition, they constantly need high-quality fuel and oil.

The work of such a device is to obtain thermal energy, from which the mechanism comes to life. Uninterrupted movement is carried out only if fuel is supplied, which mixes with air and is ignited by an electric spark. A piston engine is installed on lawn mowers, but now you can also find a rotary engine, in which there is no gas distribution mechanism.

The motor gasoline element for lawn mowers is usually made with one cylinder. This is quite enough for the device to work well. In automotive applications, motors with multiple cylinders are used.

Important! According to the principle of operation, gasoline engines are both two-stroke and four-stroke. Four-strokes are the most economical in terms of fuel consumption. Accordingly, they emit less exhaust gases.

Motor type selection criteria

Which lawn mower motor to choose? The answer to this question lies in the needs of the site owner. If you need to process a large area, then a machine with a gasoline power plant will cope with the work. Such a mower is mobile and maneuverable, with high productivity. The disadvantages of the model include:

  1. High noise level;
  2. Large mass of the car;
  3. Environmental pollution by exhaust gases;
  4. High price;
  5. Dependence on quality gasoline and oil.
Lawn mower Briggs & Stratton

If the area is small, a trimmer or electric lawn mower can refine it. It is practically silent, environmentally friendly and easy to use. Among the cons:

  1. Cable hanging underfoot;
  2. The need to connect to the mains;
  3. Handles small areas.

Interesting!If the choice settled on an electric model, then the question arises about the type of engine. Asynchronous lawn mowers are cheaper than synchronous motors, but they are inferior in power to synchronous motors. In such devices, the structure practically does not heat up, it is not difficult to maintain it. On the modern market, the most common lawn mowers with an asynchronous motor and direct drive.

Engines from the best manufacturers

Lawn Mower Oleo Mac

According to reviews, engines for lawn mowers from the best manufacturers go under the brands:

  • Honda;
  • Briggs & Stratton;
  • Lifan;
  • DDE (Dynamic Drive Equipment);
  • Patriot, etc.

Honda

Note! The cost of the engine is quite high and varies between 5-30 thousand rubles.

Engine replacement

Over time, the power plant may fail. It starts with a decrease in the number of revolutions and work not at full capacity. A faulty car may stall at any time and will not start after a long time.

Lawn mower rider

The reasons for repairing or replacing an engine are varied. For example, improper storage in the winter, the car was not cleaned, left in a cold, damp room. The equipment will also fail if an accident occurs during operation: the machine has run over a large object, and the internal parts are deformed. In addition, the engine may burn out if you work with it for too long, while mowing an uneven area with debris and stones.

Important!An electric motor most often flies due to broken wires or oxidized contacts.

Internal combustion engines are not replaced unnecessarily. The owner must first check the fuel, oil, spark plug, mounting bolts, pistons. If the problem is a malfunction of the engine, then it must be replaced.

Specialists cope with engine replacement promptly. First, the old motor is carefully removed. A new one is placed in its place. Set it taking into account the complete coincidence of the mower parameters.

It is best to understand the types and types of lawn mower engine before purchasing the equipment. In this case, the owner of a country house will be able to pick up a device, taking into account their preferences and needs.