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Author Topic:   557 HP Outboard
MattInSanDiego posted 01-28-2015 01:16 AM ET (US)   Profile for MattInSanDiego   Send Email to MattInSanDiego  
Somehow I missed this cool outboard from Seven Marine. It would be a little too much power for my Outrage 22, but the technology looks cool.

About the company

Overview of the 557

Cool controls

Other videos

Take care,

jimh posted 01-28-2015 05:23 AM ET (US)     Profile for jimh  Send Email to jimh     
About four years ago, when this engine was introduced, there was quite a bit of discussion about it in a thread at

frontier posted 01-28-2015 10:16 AM ET (US)     Profile for frontier  Send Email to frontier     
I thought the styling of the new Evinrude ETEC G2 looked familiar.

Teak Oil posted 01-28-2015 07:05 PM ET (US)     Profile for Teak Oil  Send Email to Teak Oil     
Yup you could by five outrages for the price of one of those outboards
boatdryver posted 01-28-2015 07:35 PM ET (US)     Profile for boatdryver  Send Email to boatdryver     
...and, dual 300's are $20K less that one 557; quad 300's are $60K or more less than dual 557's, and the 300's are mass produced with good track record.


outragesteve posted 01-29-2015 03:54 AM ET (US)     Profile for outragesteve  Send Email to outragesteve     
I was in Fort Lauderdale in December, sitting on the lanai watching the boats (bling) go buy on the intracostal, and here comes a 42'maybe be a 46' Intrepid with four 557's on the back. Doing the math, that's close to half-million dollars on the transom! Total package must be over a million. The name of the boat is "Impeachable." Speeds in the high 70's with major gas consumption. Cool factor? Off the charts! Maybe the lottery will buy me one.
Peter posted 01-29-2015 11:02 AM ET (US)     Profile for Peter  Send Email to Peter     
The 557 is about $75,000 per copy so four would put $300,000 on the transom.

The new 420 Outrage might be a candidate for three 557s (3 x 557HP = 1671HP). Currently, there appears to be no way to get close to the maximum of 1675 HP with any Mercury branded power unless the boat can handle FIVE Verados.

Swellmonster posted 02-03-2015 09:48 PM ET (US)     Profile for Swellmonster  Send Email to Swellmonster     
OMCguru posted 02-04-2015 08:56 AM ET (US)     Profile for OMCguru  Send Email to OMCguru     
Cool engines. One of the owners of a set of twins was saying they have been modified to 700-HP very easily as the aftermarket parts and computers are plentiful since it is an automotive engine.
jimh posted 02-04-2015 11:10 AM ET (US)     Profile for jimh  Send Email to jimh     
If you had four of these outboard on the transom and ran full throttle for an hour, they would consume more gasoline than my boat does in four seasons of use.
ANDREW PITCHFORD posted 02-05-2015 04:40 PM ET (US)     Profile for ANDREW PITCHFORD    
People that have 4 of these outboards on their transom are not concerned of the season usage of petrol.
jimh posted 02-05-2015 07:10 PM ET (US)     Profile for jimh  Send Email to jimh     
I'd say that is obvious. I made the comparison to highlight the conspicuous consumption of resources. I think being conspicuous is part of the appeal of this engine.
John from Madison CT posted 02-15-2015 06:34 PM ET (US)     Profile for John from Madison CT  Send Email to John from Madison CT     
They now offer 2 models, this 557 and added a 627hp. Ho hum, only 70hp more. :))

Probably close to $90k for that engine.

Hoosier posted 02-15-2015 09:26 PM ET (US)     Profile for Hoosier  Send Email to Hoosier     
Don't be concerned, the Feds will buy a truck load.....
Don SSDD posted 02-16-2015 07:45 AM ET (US)     Profile for Don SSDD    
How big a fuel tank do you need? With 4 motors, one is needed just to haul fuel.


dgoodhue posted 02-16-2015 08:42 AM ET (US)     Profile for dgoodhue  Send Email to dgoodhue     
I wonder what seven marine did to increase the hp. I didn't see anything in the press releases. The GM LSA motor that the 557 hp motor is based on is pretty easy to increase the hp by 70 with pulley change (increase boost) and appropriate fueling calibration. GM also made a LS9 motor that made 638hp and its major difference was a larger volume 2.3L supercharger (vs the 1.9L SC in the LSA) and better internal engine parts.

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