640152a 640023 640051 640140 640152. Comes with 90 degree fitting. Fits many hm80, hm90 & hm100 engines. 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. It is the customers responsibility to make sure this is the correct item for your unit. If you are not sure please send us model and spec number off your engine and we will gladly check for you.The item “New CARBURETOR Carb HM80 HM100 for Tecumseh 640152A 640023 640051 640140 640152″ is in sale since Wednesday, May 25, 2011. This item is in the category “Home & Garden\Yard, Garden & Outdoor Living\Lawnmowers\Parts & Accessories”.concepts” and is located in Bluffton, Indiana. This item can be shipped worldwide.