I am buying a boat with this motoro on it. Still has warranty until 2023. I was wondering about the motor and why Evinrude stopped coming out with motors based on year. It seems the last one was 2012. All the rest are Model AA, or AB, AG, AH etc I found the motor on the boat we are to purchase. It is a AB model (90degrees, V6 3.3L) What do all these model numbers mean. Just curious.