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Two-cycle engines produce more power on average than 4-cycle engines. The reason is also easy to understand. Given the same engine size and specifications, the 2-cycle will produce twice as much power-strokes as a 4-cycle engine, thereby delivering more grass trimming power.
Subsequently, one may also ask, what is the difference between 2 cycle and 4 cycle?
The difference between a 2-cycle engine and 4-cycle engine is the 2-cycle only needs one revolution of the crankshaft to get to a power stroke, while a 4-cycle engine needs 2 revolutions. A two-cycle engine piston has only two strokes. The piston starts at top dead center (TDC) in its bore.
Also to know is, can you use 4 cycle oil in a 2 cycle engine?
4 cycle engines do not need oil mixed with the gas to provide lubrication, since it has oil in the crankcase. Two cycle engines have to have oil mixed in the gas to provide the lubrication needed, since there is no oil in the sump. When you used the 4 cycle gas, there was no much needed oil mixed with the gas.
2 strokes engines are not fuel efficient and emit more pollutants than four stroke engines. Since India has implemented emission standards of BS-IV, the two stroke engines are unable to meet the requirements of the pollution norms, that's why vehicle manufacturers were forced to switch to the four stroke engine.