23' Seacraft Sceptre with 250 Yami 4 stroke
 

What top speed would you expert expect assuming all is good with engine and clean hull, not waterlogged ?

Figure late 80's Sceptre

Seller reports high 30's to 40........... that sounds a bit slow for a fresh 250 ?

That does sound a little low. The motor might be mounted low and plowing.

I get 39 mph with an old (1988) 225 Yami 2-stroke with a light load.

I have been on two 23 seacraft cc's with yamaha f225's. Top speed is 44/45mph.

some guys use "knots (kts)"

others use statue miles....

Good point!

I have just completed a complete resto on a 73 cc 23" and used Divinicell in a lot of places to improve longevity and lighten the boat. It is going to have an Armstrong or other Bracket with either a 250 Yama or 300. Anythoughts on Bracket choice of speed with these two power options

a bracket with a tub as large as possible....hermco fiberglass bracket is the way to go

Mount it on the transom with a 10" CMC. Less weight, plenty of room, and easy adjustment. I'm running a 250 30"Zuke and it fits great.

My Tsunami is heavier than most and has seen 42 knots with a light dive load. That's right at 48 mph for those of you that drive those amphibious cars.

CMC bracket set up.... Way cheaper option as well.