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7 Marine

OC Mike

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I wondered how they did it.
Alot of cool stuff going on.
Interesting how it has a split drive shaft ala Merc #6.


 

zx14

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Why haven’t we seen a pair of these on a DCB yet? Too heavy?
 

Bigbore500r

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Why haven’t we seen a pair of these on a DCB yet? Too heavy?
Yes, super heavy when compared to a 400R, which is still considered heavy when compared to a 300X!
 

Tank

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might be that the 7 costs 150k each and the 400r is 45k each.
 

coolchange

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Sevens are badass. They're also bigger than anything. They're now owned by Volvo.
 

Kenny D

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Seven was brought by Volvo,so service centers should increase.I was at Intrepid boats and saw a boat with 4 627's on it and was told the cost for 4 motors was 400,000.
 

Tank

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seven marine cost break-down:

Seven 557: $79,900

Seven 627: $89,900

Optional SpectraBlade LED Package: $3,761

Rigging: $10,000 to $20,000 per outboard (higher with digital controlsand a joystick)

Custom Paint: Priced to order


Again, when compared to a 45k Merc 400r with service and warranty, etc I think you see why there's not many 7's out there.
 

zx14

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seven marine cost break-down:

Seven 557: $79,900

Seven 627: $89,900

Optional SpectraBlade LED Package: $3,761

Rigging: $10,000 to $20,000 per outboard (higher with digital controlsand a joystick)

Custom Paint: Priced to order


Again, when compared to a 45k Merc 400r with service and warranty, etc I think you see why there's not many 7's out there.
But doesn’t it seem like a lot of DCB owners have an open checkbook?
 

Tank

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But doesn’t it seem like a lot of DCB owners have an open checkbook?
Yea, I mean really if you're dumping a mil into a boat what's and extra 120k or so really? But there's no real comparison to Mercs support, service, etc.

I don't think there's been a DCB rigged with anything but Merc (when talking about outboard power)
 

Bullhead bully

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seven marine cost break-down:

Seven 557: $79,900

Seven 627: $89,900

Optional SpectraBlade LED Package: $3,761

Rigging: $10,000 to $20,000 per outboard (higher with digital controlsand a joystick)

Custom Paint: Priced to order


Again, when compared to a 45k Merc 400r with service and warranty, etc I think you see why there's not many 7's out there.
Actually the 400R with wing plate is right around $29,000. So the ratio is about three or 4 to 1. I’ll take the 400 any day.


I’m not sure what the MSRP is on the 400R engine. But all of mine were 29k ish.
 

Bullhead bully

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Power to weight ratio kills it for a cat application. Even on a big center consul aft CG must be an issue. I believe these engines way over thousand pounds each. Closer to 1200 pounds each. That’s a lot of weight outside of the boat.

Wait until we see 600 hp that weighs 600 pounds. Now that’s going to be interesting. I don’t think that’s too far away.
 

Bullhead bully

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CD8F6043-7453-488A-AB58-FDB232C93911.png


It’s a Cadillac CTSV motor. I owned a 2011. Lots of fun. But needed a much larger fuel tank. I suspect this has the same thirsty appetite for fuel.

1094 lbs , almost double the weight of the 400R

600 hp 600 pounds. Watch. It’s in the near future.
 

Flying_Lavey

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View attachment 665375

It’s a Cadillac CTSV motor. I owned a 2011. Lots of fun. But needed a much larger fuel tank. I suspect this has the same thirsty appetite for fuel.

1094 lbs , almost double the weight of the 400R

600 hp 600 pounds. Watch. It’s in the near future.
I want to see 400 to 400!!! Lol!

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Flying_Lavey

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Why haven’t we seen a pair of these on a DCB yet? Too heavy?
But doesn’t it seem like a lot of DCB owners have an open checkbook?
Weight. And I don't recall ever hearing about one of the 7 Marine motors ever set-up for a big number. Almost all have very been installed in large center consoles and such where their big number is typically nowhere near the tripple digits range. I'd be a little suspect of that blunt nose lower unit at that speed. Wouldn't be surprised if it would have some blowout/cavitation issues at high speed.

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River Runnin

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The lightest version of the 400R — 20-inch length with the 5.44-inch HD gear case — weighs 668 pounds, according to Mercury, the same as the Verado 350. Big power carries a big price: Manufacturer's suggested retail price for the Verado 400R ranges from $31,530 to $36,120 with a two-year warranty.Jul 13, 2017

It's amazing the engine (627) weighs in less than 500 pounds, and the balance is in the (1094#) drive!
 

Headless hula

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Why haven’t we seen a pair of these on a DCB yet? Too heavy?
might be that the 7 costs 150k each and the 400r is 45k each.
Sevens are badass. They're also bigger than anything. They're now owned by Volvo.



Have any of you actually HEARD one in person? I have. The gearcase/drive chain noise is INCREDIBLY LOUD/HORRIBLE.


There's a 28 playcraft poontoon on my local lake. Its fast for a 28 tritoon, but you hear the "chain" noise 3 MILES AWAY, before the exhaust note. It's an unrefined PIG.


glen kafka owns it. He ran it in the shootout at loto a few years ago.

Do your own YouTube search.
 

zx14

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Have any of you actually HEARD one in person? I have. The gearcase/drive chain noise is INCREDIBLY LOUD/HORRIBLE.


There's a 28 playcraft poontoon on my local lake. Its fast for a 28 tritoon, but you hear the "chain" noise 3 MILES AWAY, before the exhaust note. It's an unrefined PIG.


glen kafka owns it. He ran it in the shootout at loto a few years ago.

Do your own YouTube search.
What chain?
 

zx14

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Actually the 400R with wing plate is right around $29,000. So the ratio is about three or 4 to 1. I’ll take the 400 any day.


I’m not sure what the MSRP is on the 400R engine. But all of mine were 29k ish.
Oh, I agree, I’d take the mercs, I saw you and your sled at the raftup, she is beautiful, one of the things that stood out to me was the paint job (gel) continues underneath and down the tunnel, love that, since I spend a lot of time under mine, kinda like a patio cover when floating, looks great.
Nice meeting you too.
 

Taboma

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What chain?

Looked like a series of gears from the engine to transmission. But then there's nothing quiet about a chevy with gear drive versus a timing chain either. So gear whine is probably what Hula's referring to. He's heard one, I sure haven't.
7 gears.JPG
 

OC Mike

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They apparently have different gear cases.

So I guess they are going after the Hi-po market.
And yes, it's probably too heavy for the West Coast river market.

I still think it's a Bad ass piece of engineering.
Hope it soldiers on for quite a while....
 

Blackmagic94

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I find it hard to believe that a transmission built by ZF would be loud abs considered an “unrefined pig”
 

Headless hula

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I find it hard to believe that a transmission built by ZF would be loud abs considered an “unrefined pig”
Go listen to one make a pass.
I agree that it is quite an engineering feat. However,, The noise from these things is so incredibly obnoxious.
I've ridden on triple and quad 350 and 400 verado boats. So I'm saying I have 1st hand comparison from one to the other. My opinion is worth exactly what it cost you. ;)
 

Headless hula

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I find it hard to believe that a transmission built by ZF would be loud abs considered an “unrefined pig”
Also you have to consider the fact that I had my Bud Light filter on pretty strong last night while I made that post. I still stand by the statement that they are horribly incredibly ridiculously noisy.
 

rivrrts429

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I don’t think any river/lake boating was/is Seven Marines target demographic.

These motors are going on big heavy boats.

I’ve seen a lot of them rigged on the large salmon fishing type boats that move vast amounts of weight. Also on heavy center console boats where speed isn’t a concern but the torque needed to move these boats is.
 

Bigbore500r

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I think the 7 has an advantage where big torque numbers are needed to move heavy boats. 6.2 Liters of displacement plus a blower.....
I'm not sure if the lower units are even designed for high speed numbers?
 

coolchange

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Most likely you were hearing supercharger whine.
 

Taboma

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I find it hard to believe that a transmission built by ZF would be loud abs considered an “unrefined pig”
The clip I posted with all those gears was not the transmission, it's the vertical gear case that transfers power from the engine output shaft to the transmission which is horizontal below the engine. That's 180 degree of direction change. Then the transmission changes the direction another 90 degrees back to vertical, then splits to two shafts and changes another 90 degrees to the prop shaft. So using gears that's 360 degrees of direction change from engine to prop :eek: I wonder how much HP is lost between the engine and the prop ??
 

Blackmagic94

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The finest center console boats in the world are running these out boards. There is no way they are inrefined or junk to find their way on a 57’ MTI and Mightnight Express boats.
 

Flying_Lavey

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They apparently have different gear cases.

So I guess they are going after the Hi-po market.
And yes, it's probably too heavy for the West Coast river market.

I still think it's a Bad ass piece of engineering.
Hope it soldiers on for quite a while....
I think the 7 has an advantage where big torque numbers are needed to move heavy boats. 6.2 Liters of displacement plus a blower.....
I'm not sure if the lower units are even designed for high speed numbers?
Watch that. Video that OCMike posted. That was the first time I had heard that they had multiple gear cases for them. Including a counter-rotating one as well as a speed master style. I think that can open up their application possibilities a bit.
The clip I posted with all those gears was not the transmission, it's the vertical gear case that transfers power from the engine output shaft to the transmission which is horizontal below the engine. That's 180 degree of direction change. Then the transmission changes the direction another 90 degrees back to vertical, then splits to two shafts and changes another 90 degrees to the prop shaft. So using gears that's 360 degrees of direction change from engine to prop :eek: I wonder how much HP is lost between the engine and the prop ??
I'm wondering the same thing. I'd love to see some prop Dyno numbers on it. I guaran-damn-tee the advertised numbers are flywheel ratings.

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coolchange

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All outboard horsepower ratings are standardized at the prop. There are different gear cases available with a high-speed lower and a dual prop also.
 

Taboma

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Watch that. Video that OCMike posted. That was the first time I had heard that they had multiple gear cases for them. Including a counter-rotating one as well as a speed master style. I think that can open up their application possibilities a bit.I'm wondering the same thing. I'd love to see some prop Dyno numbers on it. I guaran-damn-tee the advertised numbers are flywheel ratings.

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Yes I saw the "100 MPH" gear case (Per the rep) change and dual prop --- cool, but I actually forgot to add the direction change from single shaft vertical to two directions horizontal then back to dual vertical. So another 180 (x2). So 540 degree of direction change even if you look at it as one shaft. That's gotta eat up some HP. I wonder is 20% close ? That would cost you 111 HP = 446. Even at 10% which would be harder than 20% for me to believe you're down to 500. Isn't the Merc rated at the prop shaft ?
It's a torque monster for sure and that's why the application screams really large heavy boats.
 
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