Novel carburetor for chain saw

The utility model provides a novel carburetor for a chain saw. Carburetor shell, an oil drainage assembly is arranged in the carburetor shell. The oil drainage assembly comprises a sliding groove. A mounting fence is welded in a chute body of the sliding chute; a clamping hook is rotationally connected to the mounting fence; a sliding plate is arranged at the bottom end of one side of the clampinghook; a special-shaped groove is connected to the sliding plate; a first fixing column is welded to the side, away from the clamping hook, of the sliding plate. A second fixing column is arranged onthe side, away from the sliding plate, of the first fixing column. A spring is connected between the second fixing column and the first fixing column, a sealing piece is arranged on one side of the sliding plate, the sealing piece comprises an oil blocking plug, the carburetor shell comprises an oil drainage hole, the oil drainage hole penetrates through the surface of one side of the carburetor shell body, and the oil dra