On the top of the powerhead will be a small circular sticker with the serial number on it. Your local Yam dealer will be able to give you the date from that. Age based on decals is too inaccurate. This design was built from around 1999-2004
Are you not concerned by the re-spray and de-badging ? It would have had a sticker on both sides of the transom. One with age/ce info th other with serial numbers etc.
Peter ~ Boatsandoutboards4sale ~
askboatsandoutboards4sale@sky.com ~ 07930 421007