What is the service life of a four-stroke engine?

[LeMalachi]

Four-stroke engines generally have a service life of about eight to ten years. The service life of a four-stroke engine is related to the following aspects: It is related to the total mileage of use. It is related to the user's maintenance level. The advantages and disadvantages of a four-stroke engine are as follows: Advantages: The intake, compression, expansion (combustion), and exhaust processes are carried out separately, resulting in reliable operation, high efficiency, good stability, and a wide range of rotational speeds from low to high. The fuel consumption rate is low. It operates smoothly at low speeds, relies on a lubrication system for lubrication, and is not prone to overheating. The intake and compression processes take a long time, resulting in high volumetric efficiency and mean effective pressure. The thermal load is smaller than that of a two-stroke engine. There is no need to worry about deformation or ablation issues. The displacement is large, allowing for the design of high-power engines. Disadvantages: The valve timing mechanism is complex, with many components, making maintenance difficult; mechanical noise is high; since the crankshaft rotates twice for each combustion event, rotational balance is unstable.