The list on the following page indicates Engine Type Numbers and corresponding Model Numbers.
If a model number of which the first three numbers are 500., it indicates a Briggs & Stratton Engine sold to Sears Roebuck & Co. The number following the 500., is the type Number. Reference to this list will enable you to identify model letters.
Sears model 500.20054 indicates Type No. 20054 which is a model "Z" Engine.
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