The securing element screws a head portion (13) of adjustment screws (10,11) into a gasifier housing (2). A retained cap (20) made of plastic is fixed to a wall case (30) of gasifier housing. The adjustment screw is fixed to a rotational stopper (33) of ho...

An apparatus (10) for adjusting the air-fuel ratio of a fuel mixture to be supplied to an engine. The apparatus (10) has a needle valve body (18) and a receptacle (12) formed in a main body of a carburetor which receives the needle valve body. The needle v...

A fuel needle valve assembly of a carburetor has a retainer which yieldingly restrains the rotational fuel flow setting capability of the needle valve. The retainer engages a shank of the needle valve and a parallel shaft, both of which project from the ca...

A carburetor fuel mixture adjustment assembly has a threadable holder which suppresses rotation of a needle valve body disposed within an elongated receptacle defined within a carburetor body. The threadable holder is rigidly engaged within a threading cha...