Oh, I did post the end result of this shop visit yesterday. I did pay it and no it was not a scam. Really good to know your experience, it helps puts my mind at ease even more. I did say this motor was a mid 90s but the shop classified it as a NS9.8B and that comes up online as a 1998 and a 2003 model so it may be a 2003. It sure don't look like its 13 years old! It does look more like 8 years old, it can be seen in my video here... YouTube - Nissan 2-stroke 9.8 on Oday 22
I have not been able to find any pics of the 1998 model but it lookes similar as the 2003 in the manual. I don't know maybe I need to call the shop and ask them. The previous owner of my boat when I bought it last year never knew the year of the motor either. Anyone recognize any noticiable differences of it in the video that can distinguish a 1998 from a 2003?