This carburetor is compatible with GX35 52cc, 49cc, 43cc, 40cc engines. It can be used on brush cutters, lawn mowers, etc. It is the perfect replacement for damaged or old carburetors on lawn mowers and other machines. Hole spacing: 31mm. Inlet diameter: 14mm. Perfect replacement for your old or damaged parts. Please make sure the pictures and specifications are correct before placing your order. Made of high-quality metal, durable and break-resistant. The moving parts are made of copper, which reduces the losses of the machine during transportation and prolongs its service life. The function of the carburetor is to mix a certain amount of gasoline with air to make the engine run normally, be more fuel-efficient, more environmentally friendly, and easy to start. Widely used in agriculture, fishery, animal husbandry and forestry. Kit includes: 1 x carburetor, 1 x gasket, 2 x fuel suction pump, 1 x fuel filter pipe assembly, 1 x spark plug, 1 x auxiliary fuel filter. Carburetor