Briggs & Stratton 691668 Air Cleaner Knob Replaces 493903 692297 281051 Briggs & Stratton 691668 Air Cleaner Knob Genuine Briggs & Stratton Part New OEM Part Replaces Old Briggs # 493903, 212706, 212292, 691668, 692297, 281051, 231532, 94249