Ignition coil compatible with Briggs Stratton engine horizontal and vertical shaft models: 16 Hp - 18 Hp 433431, 422435, 422436, 422437, 422777, 42A707, 42A777, 422707 401415, 401417, 460707, 460777, 461707, 462707, 463707 590781, 394891, 392329, 421417, 421431, 421437, 421707 for lawn mower lawn tractor mower mower code: 3-390 original part number: 392329 394891 394988 590781 cz