kütusesegule

Kütusesegu is a term used in Estonian to describe a mixture of fuel and oil, typically for two-stroke engines. These engines, commonly found in chainsaws, leaf blowers, motorcycles, and older outboard motors, require a specific ratio of gasoline and lubricating oil to function correctly. The oil is crucial for lubricating the engine's internal components, such as the crankshaft, connecting rod, and cylinder walls, as the engine does not have a separate oil sump like a four-stroke engine.

The correct ratio of fuel to oil is vital for engine longevity and performance. Too little oil can lead to excessive wear and engine seizure due to insufficient lubrication. Too much oil can result in excess smoke, carbon buildup, fouled spark plugs, and reduced engine power. Manufacturers specify the recommended fuel-oil ratio for their engines, often expressed as a proportion like 50:1 (50 parts gasoline to 1 part oil) or 40:1.

It is important to use the correct type of two-stroke engine oil, as these oils are specifically formulated to mix with gasoline and burn efficiently. Using standard motor oil or other lubricants not designed for two-stroke engines can cause significant damage. Kütusesegu is usually mixed in a separate container and then poured into the fuel tank of the equipment. Some modern equipment may use oil injection systems that automatically mix the oil with the fuel, but for most applications, manual mixing is required.