A gasifier (17) has a carburetor body (26), in which a suction channel section (18) is designed. In the intake conduit section (18) opens out at least one fuel orifice (27, 28). In the intake duct section (18) is a throttle valve (24) is mounted to swivel in a completely open position the intake conduit (44) in the region of the throttle valve (24) in a mixture channel (21) and a supply duct (8), so that in the fully open position of the throttle valve (24) in the feed channel (8) with a proportion of fuel in combustion air flows, the smaller than the fuel portion is in the mixture channel (21). In the intake duct section (18) is at least one partition wall portion is provided which, between the supply duct (8) and the mixture channel (21) runs. The partition wall portion is integrally formed on the carburetor body (26).
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