Had a much lighter, no upper deck, 25' crestliner with a 135 2 stroke would do low to mid 30's with a few people. At that speed it was hard to keep it from cavitating from the toons lifting in the rear so much yet at slow speeds the motor was almost buried. Also used a lot of fuel over 3500 rpm, like way more than my 21 hallett with 454 mag cruising along side.