Take everything off the boat, have 1/4 of fuel, no water, no waste, and 2 people on board and I am sure you would hit over 36. Sea Ray doesn't test their boats with a full load of summer stuff, if you're getting 35 mph you are right on the mark or ahead of the curve as far as I am concerned.
End of the season with fresh plugs, caps, rotors, wires, oil/filter changes, timing adjust to 10deg since we have only 93, and all 4 water/sep filters.
1/4 fuel, 1/2 water in front, no tabs, 57 deg temp day, 1-2' seas, and two guys finishing up the beer in the fridge.
Im just saying that 36-40 seems high.
I hit 35 ONCE. Going downhill on the St Lawerence Seaway with the tide at my stearn. Most times I'm really pushing to get over 30-32 with a cooler full and the wine cellar fully stocked.