Check out this thing! 23' Seacraft 600hp 96mph!
 

Look what I found . I'm not allowed to paste a "For Sale" ad


Twin Merc 300xs (which I think are known to put out 320hp on dyno) on a 23cc!?

Owner claims 84kts.

Seems to sit ok with that weight on bracket.

Not sure I want to steer it at 80+ mph with vise grips for a steering "lever"!!!! :)

Come On Don! I know you ain't scared! Let's see the video where he powers through the chinewalk!!! First SeaCraft with a pad???

No Replacement for Displacement!!! Subscribed!

Part II

Well Michael, here's the deal. When I was younger I wouldn't be scared at all, however when you get to be an old fart good sense and the fear of getting your guts splattered all over the water overrides questionable adventures. :)

Speculate cruise is therefore around 55 mph, guessing fuel burn around 25 p/hr.

Plus extra fuel for the roostertail 😁

That speed equates to 96mph.... sorry I'm calling BS. There are equally powered hulls out there that are built for speed that don't get near that.

You woosie......:rolleyes:

Donnie, Donnie, Donnie, whats one more pair of vise grips to
go 90++ MPH...:eek:

Two pairs on that SeaStar is all that would be needed to keep a straight
line in the ICW !! :p:D

Your guts being splattered all over a channel marker would not matter
at this point....:cool:

Agreed Don & Mike
Btw: Rooster Tail by way of jack plates.
Way too much weight on that fantail. :rolleyes:

With all due respect Ken...
I took the hook out of my 20 SF when re-habbing and bolted
a heavily modified 200 HP carbed Merc that hits 64 MPH with
a light load at top end WOT !!!

So a 23 with more then three times the ponnies doing 90 MPH is
not out of range...

Just my 2¢ worth...:)

What!? The 20 has a hooked stern hull?

37.

37.

He runs away from fleet because he can.


Another secret.
Big tabs.

splitting hairs.....

Rooster is impressive...I want to see a video of Powering/Steering through the chinewalk! I have expired APBA life jackets, bad ass Shoie helmet and will sign the waiver!.!

When and Where?

Hey Mike, Dave has his Seavette for sale, ask Sandy if it's fast and fun!! No Shoie required. :)

I agree, there is no way he is doing anywhere in the 90's or for that matter probably in the high 80's. I know what my bracketed hull felt like doing over 63-65 mph and it didn't feel good. More than likely I can see it running somewhere in the 70's but that's going to be it with out special prep. It may have the potential to do over that but aint happening with out bottom mods. Now if he has big k trim tabs and could keep it from walking all over the place he probably could get it to behave in the 80's but me I wouldn't want to run it at wot.

Now, on the other side of things I bet he can cruse at 60 mph at 4800-5000 rpms all day if he can keep the fuel in it. Sometimes having more power isn't about wot but about being able to run a nice fast speed at 2/3 throttle. Going 60+ mph offshore on a nice day to the stream 60 miles out in just an hour would increase fishing time and make running back in not so bad. That's why I have a 400lb 200 on my 20. I can run 48 mph at 2/3 throttle all day and get where I want to go fairly fast. I cant stand cursing around below 40 unless I am just killing time.

I know a guy that had a 23 with twin 250's that maxed his out with 4 people on board at 67, he said the fastest he seen by his self was 63mph. Without the weight of the extra people he couldn't keep it in the water.

Now I will take that pair of outboards and throw them on the 27 in a heartbeat! They would do nicely. A little heavy but nicely.

You are right in line with my thinking. If this was even an 80 statute boat it would be dominating the Scream and Fly forum and would not need advertising to sell it. It kind of reminds me of the Flying Norsman with the triple V8s.... Just because you have the HP doesn't mean you have all that equates to a radically fast boat. Power is just 1/3 of the equation.

Nobody is more a SeaCraft koolaide drunkard as I am but I have been to the Suwannee meets and seen what it takes to get a boat into the 90s+ and the Potter 23 isn't the platform to do it in.

Was on an island runner 26 w 250 optis 6 people and 67. Said he sees 72 light.

I've seen a video of that boat doing 80. I'll have to find it

Would like to see that ......80.........with a lot more left to go !

I love fast and love my SeaCraft but 85 or 90 +. I wonder what they have for insurance if any?

Actually he will have no insurance if he makes a claim and the insurance company finds out he was over powered by about 300 to 350 hp from the original manufacturer's limits. Funny how insurance companies will take any information you give them about your boat as true, max power sticker, etc. when you purchase the insurance, then if you have a major claim out of nowhere they know all about your boat's limits. Years ago I had a friend who re-powered his boat and was over powered by 25 hp over his capacity sticker and original insurance application, 175 hp vs 150 hp, hit a oyster bar and tore up the engine, hull, etc. and they told him tough crap, thanks for your premiums. I remember him telling them he got a real good deal on the 175, the agent said "not really"!

I know someone who was denied a claim when towing in excess of rated towing capacity. The boat came off the trailer at highway speed ripped the drives off, ground the bottom down to the bone before it slid into some guardrails. If they can find a way out of paying they will.

I rigged a new 20' SF back in the mid-80's with a Bridgeport 2.4L on a jack-plate, with 12" K-planes, and it could touch 70mph, but it was right on the edge of uncontrollable from about 62 and up, and even at 58, a hard crosswind gust would start it chine-walking.

Fast, but not so much fun cleaning your underwear after a full-throttle run. I rigged that thing for a young (twenty-something) female attorney in West Palm Beach. She kept the boat less than a year before trading it in on a 31 Tiara-Pursuit.

FF I have a 20ft center console with a 400lb 200 Merc with a worn out 14" 19 pitch SS prop and get 48 at WOT bout 6800 RPM.

I need a new prop and I would like your suggestions.

I have been told the bigger diameter props for the 2.5 liter and four strokes are to big for my 2.0 liter.

I want to be in your range 48 mph at 2/3 throttle.

I know with my prop being worn so bad is increasing the RPMs a lot but I also think I may can do a 21pitch.

Suggestions please.

I would prop to the next pitch to get you rpms down some if you don't normally run heavy loaded sometimes and also stick with the small dia props 14.5 inch or so. The 2.0s don't like the big 15.5 inch plus cupped wheels so well. My 200 is a modified 2.5 with an aftermarket Brucato computer box and some other mild items done to it. Nothing to rad but it may put out 220-230 hp or so vs a standard 200. I found out for faster top end speeds the smaller and lighter 14.5 inch props with give you more MPH. The mercury 40 or 41 series style are lighter and faster than the newer 44 or 45 Plus series with vent holes. The mirage plus props at 15.5 do much better far as handling, keeping on plane, lifting the rear and cupping the water in ruff conditions but will lose you 3-5 mph. Like mentioned I have ran chopper surface props and also the rev four mercury prop, getting you motor height right and the lower unit out of the water so the AV plate is visible while under way not dragging will help you more than most props as you don't have the drag. You may pick up more with adjusting the motor than changing props. Also my hull is super light with only the necessities, less that 30 gallons of fuel and no seating or any other add-ons. I never finished out the hull as I started other projects so how much you load the hull will effect you too. Start with getting you motor height right, get the right pitch to match RPMs so that you can hit max limit or slightly above with your self and normal load, then you can try different prop types. The 3 vs 4 blade you may need different pitch as a 19 four blade may act as a 17 three blade. Also try to move weight forward and balance the boat out best you can.

Thanks.
That is all good information and I have realized about all of it before I posted the question.

I did not know about the 40 and 41 series props so you gave me something to research.

Thank you again for replying.

Yea the older 40 & 41 props are lighter and have thinner blades where as the newer Plus props have thicker blades that flex less and are less prone to cracking. There is give and take. Thicker blades are stronger and don't flex as much but the lighter ones are faster!

It's nuts to have that much power on the back. A friend of mine had those engines on the back of his 27 magnum. The fastest he every got it running was 78mph. Going that fast is dangerous . . .

http://www.offshoreonly.com/forums/m...fe-killed.html

Thats my boat! yes, im currently restoring it.... going to try to hit 90 mph. Yes, it does eat up all the boats that are suppost to go fast. Yes, its extremely stable and does not chine walk unless you over trim the boat. I decided to keep it and completely gut the boat. Could use some input. Removing liner and would like to take the deck all the way forward without step...

This is very interesting to me - several members have reported moderate to severe chine walking on 23s somewhere north of 60 with twin OBs while others have not had a problem up near 70 (Seavette). Did you run into chine walk and, if so, what did you do about it other than trim?

Thanks for posting that Tim. Things happen fast out there. I`m happy I have 150s
for the race boat. Not so happy after pulling off the paint and fairing work.
Can`t believe a pro shop did such crap work.

I`m shooting for balance and min plane speed. Min plane speed will be far greater
than my wish me thinks. Been thinking of K planes or maybe a better design.
I`m thinking wider.

I`ve had a safe drivers endorsement since `92.
My childhood friends remain in disbelief when visiting.

Cheers,
Notsofastanymore

If your goal is to hit 90 mph with that boat I would start with adding a transom notch and work to flatten the back bottom of the hull to give more of a pad to run on. And since you appear to be working this to be a performance boat any deck work should be done with composites as there is lots of weight to be lost if you are getting into that anyways.

I interested to what you are running for props to get the speeds you are seeing? Pitch?

I went along for a ride on TheOtherTom's high powered Whitewater with some other Seacraft loonies along time ago and we hit 68mph in the ICW with throttle left :) I can see feel the smile on my face.

Removing liner begs the question - replacing it with what?:eek:
I suppose coring the hull would make sense in lieu of a liner. I highly recommend full tight leathers and a hard hat. Also curious about yer props.

Saw this boat at Black Point Marina, and the boat does sit well in the water, and the owner stated it would do around 90 mph, and it had a steering wheel on it at the time I saw it. My 71, 20' Custom CC does over 60 with a 225 Opti on the back, and will chine walk a little if you trim it out to much, so 90 mph plus is not out of the question.