What type of engine cooling system is generally lighter and simpler?

Air-cooled engines are generally considered lighter and simpler due to their design and operation. In an air-cooled system, the engine's heat is dissipated to the surrounding air, which eliminates the need for complex components such as water jackets, radiators, and coolant pumps found in liquid-cooled engines. This simplicity leads to a reduction in the overall weight of the engine, making air-cooled designs particularly advantageous for applications where weight is a critical factor, such as in lightweight vehicles, portable equipment, or certain small engine applications.

Additionally, air-cooled engines often have fewer maintenance requirements because they do not rely on liquid coolant, which can leak or require replacement over time. This straightforward design makes air-cooled systems easier to manufacture and repair, further contributing to their appeal for many small engine applications.