Carburetor base of engine

A carburetor base assembly for an engine having a cylinder and a carburetor, the carburetor base assembly comprising:

• a carburetor base defining an axial through-hole having a surface and an axially extending pulsation hole channel defined in the surface;
• and
• an anti-blocking component, the anti-blocking component being a tubular member mounted in the axial through-hole and defining an air inlet channel therethrough, the tubular member defining an annular recess on an outer wall thereof, the annular recess communicating with the axially extending pulsation hole channel, a radial through-hole defined through the tubular member connecting the annular recess and the air inlet channel, the radial-through hole being located above the air inlet channel when the engine is held in an upright operating condition, whereby the air inlet channel communicates with the axially extending pulsation hole channel via the radial through-hole and the annular recess so that fuel oil vaporized by the carburetor passes through the air inlet channel and into the cylinder reducing the possibility of the pulsation hole channel being clogged by condensed fuel oil.