Mid 70's with that Skeeter would be very optimistic. The 190's that were built in the late 1990's were not 18.5' they were 19.5' and max rated for a 200hp motor. It is basically the same thing as a ZX200 today. Skeeter changed their model numbers about 2000 but I don't recall exactly what year. Most of the guys running the 19.5 foot Skeeters with 200's are seeing anywhere from 68mph up to about 72 depending on set-up, prop, jackplate height, load, etc. That Sprint with a 225 I would expect to break 70 pretty easy but I can't give a concrete number cause I don't know all that much about them. I do however have a lot of seat time in a Skeeter. They are nice boats and provide a very stable fishing platform. BTW that is an all composite hull on that one which is denoted by the "C" in the model number. They added the "C" in the model number for a while when they were transitioning from wood transoms to all composite hulls after Yamaha acquired the company (I believe that was 1996 if memory serves me).