1992 MotorGuide Electric Trolling Motor Models Where can I find my serial number? D45 [D] 9001157BD R21 [R] 9001180BD R28S [R] 9001183BD R33 [R] 9001192BD R45 [R] 9001196BD RL21 [RL] 9001181BD RL45 [RL] 9001197BD RX28S [RX] 9001185BD RX33 [RX] 9001194BD RX45 [RX] 9001198BD T21 [T] 9001120BD T28 [T] 9001112BD T33 [T] 9001122BD T45 [T] 9001126BD