Carburetor air-fuel mixture adjustment assembly and tools

A tool for rotatably adjusting a valve with a head having an exterior cylindrical surface and a pocket in the head with an inner cylindrical surface and a recess in the pocket and extending generally radially outwardly toward or through the exterior cylindrical surface with the valve received in a receptacle of a carburetor with a passage of the receptacle open to the exterior of the carburetor and the passage having a cylindrical surface with the head received in the passage, the tool comprising:

• a shank having generally opposed ends, a cylindrical exterior surface portion extending to at least one end and being receivable in the pocket of the valve and having a diameter smaller than the diameter of the inner cylindrical surface of the pocket and a slot extending radially through at least a portion of the shank and axially from essentially the one end of the shank toward the other end of the shank;
• a lever arm received in the slot and having a generally radially extending dog adjacent one end and a tab adjacent the other end, the lever arm being movably mounted in the slot and configured so that by manually manipulating the tab the dog can be moved to a first position wholly within the shank and to a second position where the dog projects generally radially outwardly of the shank immediately adjacent the one end of the shank;
• a spring carried by the shank and yieldably biasing the lever arm to dispose the dog in the second position;
• and
• the tab is configured so that it may be manually moved to move the dog to its first position so that the one end of the shank can be inserted into the pocket of the head of the valve, if need be the shank rotated to align the dog with the notch, and the tab released to move the dog into the notch so that rotation of the shank rotates the valve to adjust an air-to-fuel ratio of an air-fuel mixture supplied by the carburetor to an operating engine, and the tab may be manually moved to retract the dog into its first position to disengage the dog from the notch and while in its first position, the tool can be generally axially removed from the valve and the passage without rotating the valve.

A tool for rotatably adjusting a valve with a head having an exterior cylindrical surface, an outboard end face and a groove in the exterior cylindrical surface and axially spaced from the outboard end face, with the valve received in a receptacle of a carburetor with a passage of the receptacle open to the exterior of the carburetor and the passage having a cylindrical surface and clearance slots, and with the head received in the passage, the tool comprising:

• a body having spaced-apart ends with a bore opening through one end and communicating with a generally co-axial bore opening through the other end;
• at least two arms movably carried by the body, extending generally axially outwardly of the one end of the body, having a hook extending radially inwardly at a distal end, circumferentially spaced apart, and configured to be inserted into an associated clearance slot in the passage to dispose the hook into the groove in the exterior cylindrical surface of the head of the valve;
• a clamp member received between the arms and having a rod slidably received in the bore and extending into and having a free end in the counterbore of the body;
• and
• an actuator shank carried by the body and engageable with the rod to move the clamp member to a first position bearing on the end face of the valve head and urging the hooks into firm engagement with the valve head when the hook of each arm is received in the groove in the valve head so that rotation of the fingers and clamp member in unison rotates the valve to adjust an air-to-fuel ratio of an air-fuel mixture supplied by the carburetor to an operating engine, and movement of the actuator in a direction generally opposite to the one direction of its movement releases the firm engagement of the hooks and the clamp member with the valve head and after moving the hooks out of the groove, the arms can be generally axially removed from the valve head and the passage without rotating the valve.