I was looking for some information on the optimax compared to the xr6 and noticed that it did not list any motors over 150 in the two stokes other than the OptiMax. Did mercury stop producing the EFI, and when did it stop.
The reason you are having trouble finding it is the xr6 is not efi.It is carburated..... 04 was the last year for production but they sold them through 06 (left overs). Yes they still have the efi...