Donald; You have the wrong model #. It is either FJD50 or FJF50. The FJD50 has cushion tires and 4 cylinder Continental engine. The FJF50 has pneumatic tires and a 6 cylinder Continental engine. I have service and parts manuals for both.
If the plate is missing the serial # should be stamped on the right hand side of the frame right next to the floor board.
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