What is the consequence of an incorrect air/fuel ratio in a four-stroke engine?

An incorrect air/fuel ratio in a four-stroke engine can lead to a loss of power and potential engine damage. The air/fuel ratio is crucial for optimal combustion. If there is too much air (lean mixture), the engine may run too hot, leading to overheating and damage to components such as valves and pistons. Alternatively, if there is too much fuel (rich mixture), the engine can experience poor combustion, resulting in unburned fuel, misfires, and buildup of carbon deposits. This scenario not only reduces the engine's power output but can also contribute to reduced efficiency and increased emissions, further stressing the engine over time. Maintaining the proper ratio is essential for ensuring both performance and longevity of the engine.