17p Enertia on Frankenmerc 175hp pushin the 23
 

https://www.youtube.com/watch?v=jg7c...ature=youtu.be
https://www.youtube.com/watch?v=gI9A...ature=youtu.be
Squeaking out 43mph

Gained 3.5mph over the mirage plus 15

4400rpm cruise @ 34mph

You're awesome!

Thanks Tiny . . . I didn't think it was too bad for a 1987 2.4L 175hp Mercury powerhead . . . Put another 70 miles on it yesterday with the new prop. I'm fairly sure a new 150 4 stroke Merc would be able to hang with a 27 year old 175hp :)

http://www.wellcraftv20.com/gallery/...bum07/44_G.jpg

More proof exemplifying the significance of the right prop for achieving the real potential of these hulls! Light is right, and stern-lift is a gift.

Good stuff, Big - WTG:cool:

Gillie - I can't wait to see what the 2.5L 240 sportjet block will do . . . I'll be swapping that motor on after fishing season. Might even see 50 :) You never know.

Those 2.4Ls from the 80s have some power! I love it! Thats not too shy of what I get running my EFI 2004 250hp! WOT is about 45-46mph, Sweet, thx for sharing!
I am seriously considering hanging twin 2.5s on the back, Id need to change up my bracket to a full hermco, but I think the boat would run about 70mph and cruise in the upper 40s. Decisions, Decisions :)

I know right. Silly numbers there. Love it.

Twin 15" Mercury Inertia's
 

Here are a pair of 15" x 15" Mercury Enertia's fitted with Evinrude hubs on a 25', 1967 Bertram Moppie.
Lots of blade surface for cruising. The 115's turning 4,150 make 23 MPH, 5,500 make 35 MPH. The boat and gear is 7,000#+ when we push away from the dock. Topped off with 36 gallons after last 84 mile trip.

floscan calibrated
 

A week of trips and the floscan has been right on the money.
http://www.wellcraftv20.com/gallery/...454c.sized.jpg
http://www.wellcraftv20.com/gallery/...454e.sized.jpg
http://www.wellcraftv20.com/gallery/...57_G.sized.jpg