New old boat came w/ trolling motor. It has been painted blue and I'm having trouble finding the seral number. I found one on the bottom of the indicator head (other end of the shaft from the prop) that says 2L683130. I thought that would be the SN but when I search in part stores, it is not found. Any idea where the SN is located. I could email photos if that would help. This motor is: 12/24, foot control, 41Lb, speed control 1-5. That is all the info I can find.