I'm interested on bidding on an ebay Mercury 25, serial number 0G170657. It does not have a lower unit. I now see that a Mercury 25 lower unit that is from model year 2000 is up for auction. In some internet boat parts research, I discovered information that serial number OG170657 indicates that it was manufactured in 2001. My question is: would a lower unit part for serial numbers that begin with "0F......" work with the one year newer upper half? In other words, can a 2000 lower unit be fitted together with a 2001 upper unit?