[FishStretcher]

My stats:
Lots of bottom paint
366lb 4 stroke 100HP
Plus
60 lb kicker
Plus a under prop fin and 4 blade prop for more lift but more drag
34 MPH
5-6MPG (I run a 20 gallon tank- no need for more)
12 knot/14MPH planing speed

With no fin and a different prop(12.75 x 17) and no kicker I think 37MPH could be had, maybe 38 with a SS prop and no bottom paint, albeit with a higher minimum planing speed.

I don't need trim tabs.
Just a data point. I spent a lot of time and a little money on props and fins to get the best out of a light low power outboard. I don't even have a stainless prop, so if 40 MPH is your goal, there might be a light weight efficient way to get there with something like an Etec 115 or 130?