The Poulan 545174401 Chainsaw Carburetor Air Valve Assembly is a carburetor component that helps regulate airflow within the fuel and air intake system of compatible chainsaws. By controlling air movement through the carburetor, it supports the proper air-fuel mixture needed for engine combustion. This assembly contributes to consistent engine operation and helps maintain the carburet... https://www.wholetoolbox.com/poulan-545174401-chainsaw-carburetor-air-valve-assembly/545174401.html