I have a 89-91 Evinrude 40 VRO( I believe), that doesn't have an ID sticker. I've searched this forum and couldn't find the answer to this. There is a core plug that has a serial number(or at least I think so), which reads G2510134. I found all the charts that decipher the year from the model number, but I don't have one. I need to order a trim pump and I see that there is a difference between 89-91 trim pumps and 92+. There are a couple pumps on Ebay that say they are good for 89+, but I'd like to get to the bottom of this for future reference. Can anyone help me out?