Patent ID: 7108251

Claim:
A carburetor for an internal combustion engine, comprising: a throat having a bore that extends through it from a first end into which combustion air is drawn to a second end through which an air/fuel mixture exits the throat; a fuel bowl having walls that define an interior volume; a jet passageway from the interior volume of the fuel bowl to the bore of the throat to provide a flow of fuel from the interior volume of the fuel bowl to the bore of the throat to mix with the flow of air through the bore; a fuel enrichment system having a passage formed in a body, said passage has an inlet in communication with the bore of the throat, the fuel enrichment system having an air passageway that supplies a flow of air to the jet passageway at engine speeds above a start-up cranking speed of the engine, the fuel enrichment system being responsive to vibration of the engine at normal engine operating speeds to reduce the flow of air through the air passageway to the jet passageway above the start-up cranking speed of the engine; the passage in the body being formed by a generally vertical bore, which extends from a proximal end at the inlet of the passage of the fuel enrichment system through the body to a distal end that communicates with the interior volume of the fuel bowl, and a generally horizontal bore, which extends from a proximal end at the generally vertical bore to a distal end at an outlet of the passage of the fuel enrichment system; and a valve seat press fit into the distal end of the generally vertical bore, a passage in the valve seat allows the flow of air from the vertical bore to the horizontal bore.