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For Briggs and Stratton 170402, 170412, 170432, 170437, 170452, 171431, 171432, 171437, 171452, 171457, 176432, 176437, 176452, 190402, 190406, 190407, 190412, 190415, 190417, 190432, 190436, 190437, 190452, 192402, 192407, 192412, 192417, 192432, 192436, 192437, 192452, 194412, 194415, 194417, 194702, 194706, 194707, 195412, 195415, 195422, 195423, 195431, 195432, 195435, 195436, 195437, 195452, 195457, 197402, 197412, 197415, 197417, 221431, 221432, 221433, 221435, 221436, 221437, 221452, 221457, 222412, 222413, 222416, 222417, 222496, 226432, 226437, 226452, 226457, 250412, 250417, 252411, 252412, 252413, 252415, 252416, 252417, 252702, 252707, 253702, 253703, 253706, 253707, 254412, 254415, 254416, 254417, 254422, 254425, 254426, 254427, 254702, 254707, 255702, 255707, 256412, 256417, 256422, 256426, 256427, 256452, 256457, 256702, 256705, 256707, 257702, 257705, 257707, 258702, 258707, 259702, 259707, 282707, 285707, 28A702, 28A707, 28C702, 28C707, 290442, 290446, 290447, 290772, 290777, 40A777, 422432, 422435, 422437, 422442, 422445, 422447, 422707, 422777, 42A707, 42A777, 42B707, 42D707 & 42D777 series engines.