Carburetor lawn mower Overhead Valve OHV 550 Series with Autochoke 591109 New BRIGGS and STRATTON Engines Vertical shaft 222023 for lawnmowers ORIGINAL CARBURETOR NEW BRIGGS OHV ENGINE For 550 Series OHV with Autochoke CODE: 222023 REFERENCE ORIGINAL CODE: 591109 BRIGGS & STRATTON