Since many electric mowers for lawns and gardens are offered in both 4-stroke and 2-stroke models, before purchasing these products, it is worth examining the information: which option to choose and why.
This article may be a little technical, but we tried to simplify the understanding of some of the differences and provided you with tools for an informed choice.
It is impossible to determine that one is much better than the other. This is because the first type may suit you better for some purposes, and the second for others. For this reason, we examined some of the characteristics of these engines and their comparison.
Content
The weight
Two-stroke engines are usually lighter than comparable four-stroke engines. Four-stroke ones weigh about 50% more, since more details are required for complex designs.
Power
4-stroke motokosa more powerful due to greater efficiency. However, lighter push-pull scythes may have a greater power to weight ratio. The latter is considered more practical due to the single-cylinder engine, while the four-stroke model requires several cylinders to ensure constant power generation.
Fuel efficiency and pollution
Four-stroke engines are more economical. They also provide good control of air intake and exhaust cycles, resulting in cleaner operation.
In a push-pull cycle, part of the fuel is wasted because it exits during the intake and compression stroke. Conversely, in a four-stroke cycle, fuel is not consumed during the intake of the air-fuel mixture, since the fuel is drawn into a closed system.
The use of oil and gas mixtures in two-stroke engines also reduces combustion efficiency and increases harmful emissions (burnt oil).
Lubrication
The 4-stroke engine has a special lubrication system: engine oil is separated from the fuel and injected from a separate reservoir, as a result of which it gets the best lubrication. In a two-stroke engine, lubricating oil is mixed with fuel, which reduces its service life. But due to the combined circulation of lubricating oil and fuel, two-stroke brushcutters can function in any conditions, which makes them useful manual power equipment.
Maintenance and Durability
Due to the fact that two-stroke engines burn oil and fuel, they form a dirty combustion product. Dirtier combustion leads to more wear on the engine system, which shortens its overall service life.
Cost
2-stroke types are cheaper. But their cost per hour will be higher due to additional oil costs and low fuel efficiency. They are cheaper to purchase, but they have a short life.
Analysis
Two-stroke scythes
Benefits:
- less expensive to buy;
- a light weight;
- high power to weight ratio;
- easier to repair;
- well lubricated at all angles.
Disadvantages:
- less fuel consumption / more pollution;
- you need to mix oil and gas;
- wear out faster.
Four stroke motokosa
Benefits:
- effective;
- powerful;
- easier and cheaper to refuel;
- prolonged use.
Disadvantages:
- expensive;
- heavy;
- more moving parts;
- harder and more expensive to repair;
- poorly lubricated at all angles.
Which type to choose?
It all depends on how you would like to use this equipment.
If the main factor is weight, then you can appreciate the lightness of a 2-stroke brushcutter. If you want maximum and lasting efficiency, you can choose a 4-stroke motokosa, even though it is heavier.
If you are buying a motocosa for a short time for rare use, then consider the option of a 2-stroke motocosa. Even if it breaks, its repair will not take much time and strong financial expenses.
“Since many electric mowers for lawns and gardens are offered both in 4-stroke and 2-stroke models, before purchasing these products, it is worth examining the information: which option to choose and why.” - quote. What electric mowers in ... 4 and 2-stroke models? What kind of nonsense is the author?
Author kill yourself, creature ....
After reading the first paragraph of this opus, I realized that it’s not worth reading further,
What kind of "experts" you will not see on Yandex, and more and more I am convinced that Yandex is turning into a garbage can.