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Fits Briggs & Stratton models 400417, 400437, 400447, 400707, 400777, 401407, 401411, 401415, 401417, 401431, 401437, 401707, 402415, 402417, 402431, 402435, 402437, 402445, 402447, 402451, 402707, 402777, 404417, 404437, 404447, 404707, 404777, 40A777, 421417, 421431, 421437, 421707, 422431, 422432, 422435, 422436, 422437, 422442, 422445, 422447, 422707, 422777, 42A707, 42A777, 42B707, 42C777, 42D707, 42D777, 42E707, 42E777, 460707, 460777, 461707, 461777, 462707, 463707, most twin cylinder engines. 16 tooth gear.-
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Part No. 55-2763
OEM Part No: 394808, 497596, 498148