A tamper resistant mixture adjustment screw arrangement for a carburetor (20). The arrangement includes a carburetor body (22) having at least one air/fuel adjustment screw (24; 26) threaded therein. The adjustment screw (24; 26) has a threaded shank (28) ...

A method of manufacturing a cylinder head and crankcase for a small engine. A crankcase and a cylinder head are cast to close tolerances and include as-cast mounting flanges, which are assembled in face-to-face contact by employing self-threading screws. B...