Craftsman 917.271631 Owner's Manual page 53

TRACTOR - - MODEL NUMBER 917,271631
BRIGGS & STRATTON ENGINE-MODEL NUMBER 310707, TYPE NUMBER 0137-E1
977 CARBURETOR GASKET SET
51_ 137 0 2760
1095 VALVE GASKET SET
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121 CARBURETOR OVERHAUL KIT
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358 ENGINE GASKET SET
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175_
121A CARBURETOR OVERHAUL KIT
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104A _ 127A
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53