What is the difference between a 2-stroke and 4-stroke engine?
A 4-stroke engine has no mixing of gas and oil and is a cleaner burning engine. 4-stroke motor scooters are typically slower “off the line” or from a stop than 2-stroke. A 2-stroke can (in theory) produce twice the power of a 4 stroke for the same sized engine and the same rpm’s. Advantages of 2-stroke: – 2-stroke engines do not have valves, simplifying their construction. – 2-stroke engines fire once every revolution (four-stroke engines fire once every other revolution). This gives 2-stroke engines a significant power boost. – 2-stroke engines are lighter, and cost less to manufacture. – 2-stroke engines have the potential for about twice the power in the same size because there are twice as many power strokes per revolution. Disadvantages of 2-stroke: – 2-stroke engines don’t live as long as four-stroke engines. The lack of a dedicated lubrication system means that the parts of a 2-stroke engine wear-out faster. 2-stroke engines require a mix of oil in with the gas to lubricate the
A 4-stroke engine has no mixing of gas and oil and is a cleaner burning engine. 4-stroke motor scooters are typically slower “off the line” or from a stop than 2-stroke. A 2-stroke can (in theory) produce twice the power of a 4 stroke for the same sized engine and the same rpm’s. Advantages of 2-stroke: – 2-stroke engines do not have valves, simplifying their construction. – 2-stroke engines fire once every revolution (four-stroke engines fire once every other revolution). This gives 2-stroke engines a significant power boost. – 2-stroke engines are lighter, and cost less to manufacture. – 2-stroke engines have the potential for about twice the power in the same size because there are twice as many power strokes per revolution. Disadvantages of 2-stroke: – 2-stroke engines don’t live as long as four-stroke engines. The lack of a dedicated lubrication system means that the parts of a 2-stroke engine wear-out faster.
