2-cycle Vs 4-cycle

2-cycle Vs 4-cycle

A trimmer can be a handy tool to tidy up areas of your lawn that your mower can’t reach. They can also be used to tackle weed problems and edge sidewalks and driveways. Gas trimmer engines come in two styles - two-cycle and four-cycle (two-stroke/four-stroke). Each style has its advantages and disadvantages ranging from maneuverability to power output.


Two-cycle trimmers require the use of a fuel and oil mixture. The gasoline must be mixed with two-cycle oil to the appropriate ratio that is recommended by the trimmer manufacturer. Typically, fuel and oil mixture ratios are either 50-to-1 and 40-to-1 (gasoline to oil). Four-cycle trimmers don’t require the use of a gas an oil mixture, instead, they simply use gasoline for fuel and the 4-cycle oil is put into the oil tank. Due to the fact that four-cycle engines use four strokes during combustion, they tend to run more quietly and efficiently.


Two-cycle trimmers pack more power into a smaller engine. They are capable of producing more horsepower at higher RPMs than similarly sized four-cycle engines. In addition, they are also typically lighter than their four-cycle counterparts. The greater power-to-weight ratio of a two-cycle trimmer means that it can easily muscle through dense overgrowth without seeing a significant decrease in engine power. 


Four-cycle engines require more parts than two-cycle engines, adding to the overall weight of the trimmer. Weight can be an issue for certain users who are concerned with operator fatigue and maneuverability. If you prefer a lighter machine, seek out a two-cycle trimmer for increased ease-of-use. 


Four-cycle trimmers typically cost more than similar two-cycle versions. The larger engine containing more parts, as well as the overall performance of a four-cycle engine means a marginally higher price point. For those searching for budget-friendly trimmers, there are a variety of affordable two-cycle trimmers available on the market. 

Other Differences

- Four-stroke engines complete one cycle in two revolutions of the crankshaft, while two-stroke engines complete one cycle per every revolution of the crankshaft

- Two-stroke engines are not as fuel efficient as four-stroke engines

- Two-stroke engines produce more pollution

- Four-stroke engines tend to last longer than two-stroke engines due to the dedicated lubrication system