Where Are Two-Stroke Engines Used?
Two-stroke engines are inexpensive to build and operate when compared to four-stroke engines. They are lighter in weight and they can also produce a higher power-to-weight ratio. For these reasons, two-stroke engines are very useful in applications such as chainsaws, weed eaters, outboards, lawn mowers and motorcycles, to name just a few. Two-stroke engines are also easier to start in cold temperatures. Part of this may be due to their design and the lack of an oil sump. This is a reason why these engines are also commonly used in snowmobiles and snow blowers. Advantages and Disadvantages of Two-Stroke Engines Because two-stroke engines can effectively double the number of power strokes per unit time when compared to four-stroke engines, power output is increased. However, it does not increase by a factor of two. The outputs of two-stroke engines range from only 20 to 60 percent above those of equivalent-size four-stroke units. This lower-than-expected increase is a result of the poore
