ICE type
Scheme of operation of an internal combustion engine installed on a lawn mower. Note that this division is relevant only for gasoline engines (see "Engine type") — diesel engines are extremely rare and are made only four-stroke.
— 2-stroke. The main advantages of two-stroke engines over four-stroke ones are the simplicity of the device and higher power with the same working volume, due to which such units are lighter, more compact and cheaper. On the other hand, they consume more fuel and are distinguished by a high level of noise, and such an engine needs to be filled with a mixture of gasoline and oil in the correct proportion, which complicates maintenance somewhat (there are separate refueling systems, but they are complex and expensive, which is why they are almost never used ). As a result, this option is found mainly among trimmers (see "Type"): it is there that small dimensions and weight are decisive, and the required power and fuel consumption are relatively low.
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4-stroke. Engines of this type are somewhat more complicated and more expensive than two-stroke ones; in addition, to achieve the same power, they need more volume, which affects the size and weight. On the other hand, if the engine does not need to be "carried in the hands" (as is the case with trimmers), these points do not really matter; and the difference in price, thanks to the development of technology, is becoming less and less noticeable. With a
...ll this, four-stroke engines are quieter and consume less fuel. As a result, almost all units where a relatively large and heavy internal combustion engine can be installed are equipped with this particular type of engine. And relatively recently, light and compact engines have appeared, suitable even for trimmers.Engine size
The size of the engine installed in the petrol or diesel model (see "Engine type"). Power directly depends on this indicator, however, only engines of the same type can be compared by volume (see "Type of internal combustion engine"). And even in the same type of units of the same power, the volume can be different. In such cases, note that a larger volume means more fuel consumption, but the engine itself may cost less than a smaller one.
Fuel tank volume
The volume of the fuel tank in a gasoline or diesel mower (see "Engine type").
A large tank allows you to work longer without refueling, but an excessive increase in capacity affects the dimensions and weight of the entire unit. So manufacturers usually select this indicator taking into account the power and fuel consumption of a particular engine, and in general, the volume of the tank is not critical when choosing. However, knowing the tank capacity and fuel consumption (see above), you can estimate how much one refueling will approximately last.
