This carburetor is the same as the OEM Walbro from the Echo 2511 chainsaws has a much larger throat that the stock Zama style carbs that come stock on the V-Modest, JonCutter, NeoTec, FARMMAC and KNK Power 2511 saws. the carburetor on the right in the pictures is the MP-251W. The stock carburetor is on the left and the Huayang Zama style carb is in the middle. With careful alignment it will work with the stock inlet flange and air filter from those saws.
