This is a GOOD ONE! And a bit of trivia that most will fail at. Yes, though there were not 2.5 Freshwater units listed on any of the sheets for Mercury in 2005 or 2006, Though they kept them on the order listing in the computer by accident. The echilon at Mercury found out under an EPA audit that we hahd been buying them without anyone knowing it. Production automatically generated the parts orders and we entered the orders. Management was not aware, nor had they intended on offering those EFI engines in 2005. We ordered the most of these and Bass Pro (Tracker) ordered a few of these. They found out through a representative that we were still offering and also ordering them. Then they too ordered a few. We do not believe these are in the NADA Price Guides as being available in 05 or 06 either. Once they found out we had been acquiring them, they shut the production off within a few months. So both units were produced in 2005 and 2004. May have been a few 2006 models also. Our last receipt of a 2.5 EFI was October of 2005, which might have made those 2006 models, though you will have to check the serial number tag which is labeled as such. This bit of trivia will be one for the future. BCB