Briggs & Stratton 270253 Diaphragm For 3 and 3-1/2 HP vertical engines with manual choke 82500 & 92000 series before type 0500
49-001
Briggs & Stratton 272538 Diaphragm Briggs & Stratton 272538S New style for horizontal 3-1/2 HP engines
49-005
Briggs & Stratton 299637 Diaphragm Briggs & Stratton 496418 Fits 3 HP vertical engines with automatic choke 92500 series above type 0500
49-006
Briggs & Stratton 391681 Diaphragm Briggs & Stratton 391643 For 3-1/2 and 4 HP engines with automatic choke Briggs & Stratton 496416 Fits 92900 series type 0500 & above, & 110900 series