Briggs and Stratton Air Filter part# 491588S is used on 3.5-6.5 Gross Hp Quantum Engines. This filter uses our 493537S pre-filter. It may also use part# 491435S pre-filter. Following is a list of some of the engine model series that use this filter; 091200, 092200, 094200, 095200, 110400, 110600, 117400, 118400, 11A600, 120200, 120300, 120400, 120600, 120H00, 120K00, 121000, 121100, 121200, 121300, 121400, 121A00, 121K00, 122000, 122200, 122300, 122400, 122H00, 122K00, 122L00, 122T00, 123K00, 124300, 124400, 124600, 124K00, 124L00, 124T00, 125600, 125H00, 125K00, 126300, 126400, 126L00, 126T00, 127300, 127400, 127600, 127700, 127800, 128800, 128H00, 128L00, 128T00, 129800, 129H00, 12C600, 12D600, 12F600, 12F700, 12F800, 12G600, 12G800, 12H200, 12H300, 12H700, 12H800, 12J700, 12J800, 12J900, 12L800, 12L900, 12M900, 12Q500, 12Q800, 12R500, 12S100, 12S400, 12S500, 12T100, 12X800, 133200, 135200, 137200, 138400, 150100, 150200, 15T200, 185400, 201400, 202300, 202400, 203400, 204300, 204400, 205300, 205400, 20H100, 20H200, 20S200, 20T200, 210300, 210400, 212300, 216100, 216300, 21T200, 250000, and 25T200. There may be other models that use this filter that we have not listed here. Type and code number of your engine, as well as the model number, need to be referenced to select the correct filter for your machine. Refer to your owners manual when possible to select the correct filter for your engine.
