Photo1 Briggs and Stratton large two-piece flo-jet carburetor an earlier version with a packing nut and needle.
To fit.....
Briggs carb numbers 391065, 391074, 391992, 392587, 393146, 490419
used on engines 170401, 170402, 170403, 170407, 170412, 170417, 170431, 170432, 170435, 170437, 170452, 170457, 190401, 190402, 190403, 190406, 190407, 190412, 190415, 190416, 190417, 190431, 190432, 190435, 190436, 190437, 190451, 190452, 190457, 190492, 190493, 190496, 190497, 195412, 195422, 195423, 195431, 195432, 195433, 195435, 195436, 195437, 195451, 195452, 195457, 220416, 220431, 220432, 220435, 220437, 221431, 221432, 221433, 221435, 221436, 221437, 221452, 221457, 222412, 222413, 222416, 222417, 222496, 243431, 243432, 243434, 243436, 243437, 243451, 243452, 243457, 251411, 251412, 251415, 251416, 251417, 252411, 252412, 252413, 252415, 252416, 252417, 254412, 254415, 254416, 254417, 254421, 254422, 254425, 254426, 254427, 300421, 300424, 301431, 301434, 302431, 302432, 302434, 302437, 325431, 325434, 325435, 325437, 326431, 326432, 326434, 326435, 326436, 326437, 327431, 32K437
Photo2-3 Again a Briggs and Stratton two-piece flo-jet carburetor.
To fit......
Briggs and Stratton carb numbers 390411, 390811, 391788, 491026, 491031
used on engines 146701, 146702, 147701, 147702, 170701, 170702, 170707, 171702, 190700, 190701, 190702, 191702, 191707, 193701, 193702, 193705, 193707, 220702, 220705, 220706, 220707, 251702, 251707, 252702, 252707, 253702, 253706, 253707, 256702, 256705, 256707, 280707, 281702, 281706, 281707
That's my go at them, but please check I may well be wrong....!