HIFROM TM Replace New CARBURETOR Carb GASKET for Tecumseh 640017 640017A 640017B 640104 fits OHH45 OHH50 1. New Carburetor w/ Gasket Replaces : 640017 / 640017A / 640017B / 640104 2. Fits Most OHH45 and OHH50 Engines 3. There may be different carburetors used on these models depending on the spec, serial or build date of the engine. Please make sure this is the correct carb for your unit. 4.There may be different carburetors used on these models depending on the spec, serial or build date of the engine. Please make sure this is the correct carb for your unit. 5. HIFROM carburetor from Professional Factory; Professional technical support; if you unsatisfy, can return to our USA warehouse, no risk