REVISION KIT FOR TECUMSEH CARBURETTOR ENGINE MODELS ECH90, EVC100-120, 422-80, HH40-70, HM80, HS40, HS50, LAV25-50, TVS70-120, TVXL105, 380, 660, 670, V, VH40-70 Part No.: 7-216 Original part No.: 631173, 631180 TECUMSEH