557 HP outboard from Seven Marine any good?

[audiobill5]

Hey,
Has anyone checked out this 557 HP outboard out of Merc's back yard made by Seven Marine?

www.seven-marine.com

http://www.seven-marine.com

[chris3298]

You know I'd prefer this engine in a 15 inch shaft but 20 inch I can make work, what i can't make work is the 1,000 pounds this things weighs :D not sure my little 15ft alweld could handle that kinda weight. I forgot to say it doesn't look like they make this motor in a tiller either, what a bummer

[boatmark59]

Remains to be seen. For all the boat show showings, and press hype out there, I understand they have not yet spent all that much time on the water. I heard that Intrepid was building a boat to run a couple, and that will tell pretty quick what they do and how they survive in the real world.

Interesting project.

[Fastjeff57]

Fascinating design, but why on earth is it better than a normal inboard/ outboard (stern drive)? To me, the space below decks it saves is not worth its astronomical cost!

Jeff

[JohnsonM50]

Fascinating design, but why on earth is it better than a normal inboard/ outboard (stern drive)? To me, the space below decks it saves is not worth its astronomical cost!

Jeff Good point, not only that I doubt a 7 litre worked to more hp would weigh much more & be better below deck for handling in a performance outlook. Still cool tho.

[Rotary John]

This is a project of Rick Davis; VP Engineering Mercury; and his son. I understand it was the sons idea and Rick supported him with his merc connections.

[Aeroliner]

Is it legal super E engine?

Alan

Sure is out of the box thinking! Could verywell start the move away from the stern drive system.

[Mark75H]

Sure is out of the box thinking! Could verywell start the move away from the stern drive system.

Its an old idea reborn. The 1956 100+mph speed record was set with a motor of this configuration ... a couple of Corvair motors were mounted on Merc towers in the 1960's ... Cross Radial outboards of the 1930's were a similar conversion of an aircraft engine.

If the idea succeeds this time, it will be an unusual example of something that was tried multiple times and actually caught on.

[Doubleeagle]

I rember a drag hydro from the mid 60s The boat was called 1/2 breed The guys name was Bruce Redman He stacked a Corviar on top of a Parker downhousing w/ssmaster lower He use to run 95-100 mph class he did set a record in about 1966 or 67 at over 100 mph think he registered as a fuel boat the gas record was faster I was about 15 years old and thought this was the most amazing thing I had ever seen It sounded great on the warm up Most the time it was pretty disapointing I once asked Bruce about the performance he told me he thought it was allergic to water

[Doubleeagle]

My mind is not as sharp as it use to be and I realize I rember better after a lets just say a visit to a different room Bruce use to bring the boat to Ski Land behind a tow truck a pretty old beat up tow truck most of the tools he used were borrowed or found in the bed of the tow truck I was working w/Bob Piper at the time and we always seemed to be parked next to him He knew we had a complete tool set He was quite a charater If my memory serves me right it was a older Jones Cab over He rarely brought help and we ran 90-95 or if all went well 95-100 so one of our crew could help him launch

[Rotary John]

Seems to me the Homelite/Fricer Price 4 cycle outboard was a car engine set on end also.

[Doubleeagle]

Dont know how how Bruce handled oil delivery thankin dry sump

[Tim Kurcz]

Hey guys, The "557" is a horizontal crank all-aluminum BBC with wet sump. Go to the website and look up specs. Complex and powerful, quick change. Got to be the most powerful "production" outboard ever built.

Tim

[Lars Strom]

Here is pictures I took at the Miami Boat Show last year..the engine looks for real..

[OUTBOARDER]

Needs a Low water pick-up , surfacing prop and jack it to the sky.

[chris3298]

that thing is insane

[Powerabout]

Steering done right ( OMC patented this years ago)
twin pinion lower to take the grunt

Wonder if they used anybodys bolt pattern on the lower???

[Fastjeff57]

Actually, it's a modern GM small block, not a big block Chevy:"The 6.2-liter V8 outboard features an all-aluminum, supercharged powerhead sourced from GM Powertrain that is the same engine used in the Cadillac CTS-V automobile."

But at $70, 000 each, I'd prefer a good Crusader/ Volvo outdrive.

Jeff

[FrenchPhil]

How much is a 525efi Merc ?

[Fastjeff57]

496 MAG H. O. and Bravo III $29,525

That's for a standard big block and Bravo III drive. The really hot motors and drives are probably twice that amount.

Jeff

[Powerabout]

compare 2 of them to a 1350 and then price is right

[audiobill5]

great info!

[audiobill5]

Very interesting!