Durable and corrosion resistant carburetor for lawn mowers and outdoor equipment, designed for long outdoor operation and extended life. Carburetor for chainsaws with primer, compatible with Stihl MS210C, MS230C, MS250C and with MS210, MS230; part numbers 021, 023, 025. The most effective way to boost engine performance and speed. Helps ensure excellent performance of your engine. Function: Under the vacuum produced by the engine, a measured portion of fuel is drawn and mixed with air; the energy of the intake air flow is used to atomize the fuel. Applications and compatibility: - Replaces worn carburetors on Stihl MS210C, MS230C, MS250C chainsaws and on MS210, MS230 models (with primer). - Suitable as a replacement carburetor for lawn mower use in outdoor environments requiring corrosion resistance and long life. - Ideal for equipment where improved fuel atomization and reliable performance are important.