Hello - newbie here, but not to auto and other mechanical/DIY forums. I recently picked up a lightly used, well kept, Snapper LT2048 Hydro. The numbers are - Mod: LT200H48IBV2, B&S model: 84897, s/n 50199623. It's got a 48 deck, B&S 20HP ELS Twin OHV. From the codes I see, my guess is that...