Quote:
Originally Posted by cdavisdb
I'm not much help on the OBs, but I do have an 8 hp Yammie hithrust on the 25. Very happy with it. Pushes the boat 4 knots into wind and chop and 5+ in calm conditions. This is far superior to the old 15 hp Evinrude I had on the Seabird. It had about zilch low end torque and would not do much at all into wind and chop, and that was with the biggest diameter, lowest pitch prop I could get. .
|
Connor,
Awesome and Thank You that is exactly what I was looking for on the 8hp Yamaha High Thrust. I was considering trying to find a 15 Xtra Long and then Turning it into a High Thrust. That just made my day... Got a 8hp HT Yammie sitting here in the Garage.
Definately Keep You all Posted on the Build out over the next 3 weeks.
Quote:
Originally Posted by Blue_Heron
I guess I'm late to the dance... My $0.02
- My 25 had a 260hp Mercruiser (blown) when I got it. The PO said the boat would run 40mph with it. My 300HP IO will push it to almost 45 if I prop for speed and run light. Propped for normal use, it cruises at 30mph and tops out around 40 depending on load.
- I did a "back of the napkin" moment calculation once on the CG effect of a single outboard on a bracket, twins on a bracket, and a single V8 IO. Twins shift the CG aft, no surprise. A single OB on a bracket won't move the LCG aft, but it will move the VCG upward. Put a 30gal water tank under the cabin sole and call it good.
- I believe a 250 OB will be plenty of power, but it won't be a race boat. The key to low speed planing will be the prop. If you go Merc 2 stroke, get an Opti, not an EFI. The keel on this boat is deep. You will want a 30" shaft unless you like running the powerhead very close to waterline at idle.
- One advantage of an OB is engine height adjustment. My Bravo drive is mounted about 1/2" higher than recommended by Mercruiser, and it's probably 2"-3" lower than it should be. The steep deadrise angle has a huge effect on correct engine height.
|
Blue Heron.. Thank You .. Thank You... Your calculations seem to be very close to mine. I spoke to Scott Porta today at Porta Brackets. Will be putting on a 26" 350 HP Porta Bracket in 2 weeks... Scott seems to think this is gonna be one awesome handling boat with the Single 250 on the bracket, I have to tend to agree.
I cant swing the 250 OPTI on Price now... Am working on an OX66 Yamaha from a Guy as well as a 250 Merc EFI from another. If i could swing the cash load on the Opti I would or better yet a 250 H.O. Etec that will have to come next year... The Porta bracket is almost 3k and along with Glass, Resin and all the other stuff I am gonna be 14,000 Into this sucker without much overhaul at this point. With that being said, If i can get her in the water in the next 30 or so days and run it... That should tell me where to start...
And I will be giving out all the data I can so anyone else thinkin about it with a 25' Seafari can... Thanks for taking the time to reply.. Appreciate it.
Robert