Cool new outboard

Dave R · 02-22-2011, 07:58 PM

I really like outboards. This one would rock.

http://seven-marine.com/motors/features-and-benefits/

codeman671 · 02-23-2011, 11:20 AM

That would look great on the back of a pontoon!

GusMan · 02-23-2011, 11:35 AM

Dry weight: 1000 pounds!

Would have to be a pretty big 'toon!

Gusman

ApS · 02-24-2011, 05:32 AM

This engine is a General Motors V-8, and has a 6.2 liter displacement

'More suitable for one of our lake's working barges than the average 'toon!

Dave R · 02-24-2011, 02:21 PM

It's surely not being marketed to toon buyers, but there are toons on the lake with 5.7 liter V8 power already. Just not outboards. Also, I'm fairly certain that Yamaha 5.3 liter V8 outboards (800+ pounds) have been successfully mated to toons for a few years now.

Dave R · 02-24-2011, 03:12 PM

I like two strokes better that four strokes. I'd love to see Evinrude tack a couple of cylinders onto their 3.4 liter, 300HP V6 outboard and make a 4.6 liter 400HP V8. Considering the 300 HP only weighs 530 lbs or so, a 400 HP variant should not weigh much more than 650 lbs. If there's room to increase the bore, they could probably make a 450 HP 5.x liter V8 that does not weigh much more than the smaller V8.

VitaBene · 03-01-2011, 10:08 PM

Quote:

Originally Posted by Dave R

It's surely not being marketed to toon buyers, but there are toons on the lake with 5.7 liter V8 power already. Just not outboards. Also, I'm fairly certain that Yamaha 5.3 liter V8 outboards (800+ pounds) have been successfully mated to toons for a few years now.

Tell me about it! Dan's (Ishoot308) toon smoked me on the lake one day

LIforrelaxin · 03-02-2011, 11:32 AM

At 1000lbs that is one heavy motor. Could a toon handle the weight, sure as long as it is designed for it. That is the piece that has to be understood. if the mounting platform can handle the weight and the torque of the engine then everything is fine. Oh yes one other piece the boat has to be able to counter the wieght. On the other side of the equation does a toon really need 557 h.p. engine with 550 lbft of torque? My guess is probably not.

Yamaha, V8 beast on produces 350 hp... I didn't see a torque spec but I am sure it is considerably less as well. Its like comparing apples to oranges. While the Yamaha engine may be a nice fit for some pontoons, this beast, well may just be over kill... On the other hand it would sure be cool to sea and watch.....

Dave R · 03-02-2011, 01:02 PM

Quote:

Originally Posted by LIforrelaxin

Yamaha, V8 beast on produces 350 hp... I didn't see a torque spec but I am sure it is considerably less as well. Its like comparing apples to oranges. While the Yamaha engine may be a nice fit for some pontoons, this beast, well may just be over kill... On the other hand it would sure be cool to sea and watch.....

Torque is pretty meaningless on a boat engine since the prop and final drive ratio are choosen to let the engine get to its WOT RPM, not its torque peak. That's why you don't typically see it advertised. Torque specs are usefull on a car/truck engine because you can see if the motor will need to be spun to a high RPM to provide real thrust or not.

Wolfeboro_Baja · 03-02-2011, 01:30 PM

Nice video on YouTube of the new Seven Marine 557 outboard....http://www.youtube.com/watch?v=EZaQgQIUt8w. There are a few others as well but this one seems to be the most comprehensive.

02-22-2011, 07:58 PM	#1
Dave R Senior Member Join Date: Jul 2004 Posts: 2,985 Thanks: 246 Thanked 744 Times in 444 Posts	Cool new outboard I really like outboards. This one would rock. http://seven-marine.com/motors/features-and-benefits/

02-23-2011, 11:35 AM	#3
GusMan Senior Member Join Date: May 2004 Posts: 135 Thanks: 1 Thanked 45 Times in 26 Posts	Pretty cool..... BUT... Dry weight: 1000 pounds! Would have to be a pretty big 'toon! Gusman

02-24-2011, 05:32 AM	#4
ApS Senior Member Join Date: Jan 2005 Location: Florida (Sebring & Keys), Wolfeboro Posts: 6,069 Thanks: 2,318 Thanked 798 Times in 571 Posts	GM? Do Taxpayers Get a Discount? This engine is a General Motors V-8, and has a 6.2 liter displacement 'More suitable for one of our lake's working barges than the average 'toon!

03-02-2011, 11:32 AM	#8
LIforrelaxin Senior Member Join Date: May 2006 Location: Texas, Lake Ray Hubbard and NH, Long Island Winnipesaukee Posts: 2,995 Thanks: 1,067 Thanked 928 Times in 549 Posts	At 1000lbs that is one heavy motor. Could a toon handle the weight, sure as long as it is designed for it. That is the piece that has to be understood. if the mounting platform can handle the weight and the torque of the engine then everything is fine. Oh yes one other piece the boat has to be able to counter the wieght. On the other side of the equation does a toon really need 557 h.p. engine with 550 lbft of torque? My guess is probably not. Yamaha, V8 beast on produces 350 hp... I didn't see a torque spec but I am sure it is considerably less as well. Its like comparing apples to oranges. While the Yamaha engine may be a nice fit for some pontoons, this beast, well may just be over kill... On the other hand it would sure be cool to sea and watch..... __________________ Life is about how much time you can spend relaxing... I do it on an island that isn't really an island.....

02-23-2011, 11:20 AM	#2
codeman671 Senior Member Join Date: Jan 2005 Posts: 3,638 Thanks: 225 Thanked 863 Times in 525 Posts	That would look great on the back of a pontoon!

02-24-2011, 02:21 PM	#5
Dave R Senior Member Join Date: Jul 2004 Posts: 2,985 Thanks: 246 Thanked 744 Times in 444 Posts	It's surely not being marketed to toon buyers, but there are toons on the lake with 5.7 liter V8 power already. Just not outboards. Also, I'm fairly certain that Yamaha 5.3 liter V8 outboards (800+ pounds) have been successfully mated to toons for a few years now.

02-24-2011, 03:12 PM	#6
Dave R Senior Member Join Date: Jul 2004 Posts: 2,985 Thanks: 246 Thanked 744 Times in 444 Posts	I like two strokes better that four strokes. I'd love to see Evinrude tack a couple of cylinders onto their 3.4 liter, 300HP V6 outboard and make a 4.6 liter 400HP V8. Considering the 300 HP only weighs 530 lbs or so, a 400 HP variant should not weigh much more than 650 lbs. If there's room to increase the bore, they could probably make a 450 HP 5.x liter V8 that does not weigh much more than the smaller V8.

03-02-2011, 01:30 PM	#10
Wolfeboro_Baja Senior Member Join Date: Jan 2008 Location: Hopkinton NH Posts: 395 Thanks: 88 Thanked 80 Times in 46 Posts	Nice video on YouTube of the new Seven Marine 557 outboard....http://www.youtube.com/watch?v=EZaQgQIUt8w. There are a few others as well but this one seems to be the most comprehensive.