insainly smooth deep sound... it's amazing to listen to. and they are very quiet (I have same engines on a different platform)

Beautiful sound. I have twin 2-stroke Evinrude 225s and love tuning the two engines by sound rather than by tach. Thanks for posting your video.

Nice run as the other bloke said .. I have had a pair on our Intrepid 37 ft center console since late 2007 and their still going strong after 600 hrs .. Good stuff an keep it coming ..

These motors are heavy and lack the torque and top end of a 2 stroke or the Mercury but they sure sound awesome running wide open. It sounds so good it makes you wonder if they tuned it to sound so good.

Thats Yamaha baby the sound of those twins are beatifull.

v8s will never die!!!

Some BADASS lookin engines dude!!! Cheers

Love that Yamaha growl!

I cannot wait until these engines come to the Maldives!

i love this sound so much better than the merc 350's!!! this sounds nice and smooth....

Всë баста. Вместо в8 теперь в6 4.3 литра 350 сил. Привет из России!

id be happy with this setup, FOR SURE,, music to my ears, but i want a 38 fountain with quad 300 merc xs

Those sound neat

make this into a ringtone please, thanks.

Muito bom o video....

la yamaha è sempre la yamaha

mmmm...so sweet.... i love that sound:)

I don't think they sound monotonous at all. They have a wonderful metallic drone to them.

Ok, looks like going 70 Knots!

V8 Power !!! :-)

mercury

OMG, that's expensive! they would be awesome here.

Daaaaamn

What kind of boat this?

ORGASMIC SOUND !

Wow, awesome! Would like to hear how they sound at normal cruise?

Is it a RIB boat? How fast did it go?

what's the boat's max speed ?

Almost Sounds Like A Hyperbike

How much cost this one out board machine... Rply me

5.3L each :)

they cost 30.000Euro a piece in Europe!, Jussi christ, for that kind of money i'd get an chevy 572 inboard.

YAMAHA ; MOTOR - POPA : Desenvolve VELOCIDADE de 120KM/ H ……………………OK………………………………

sounds like a 747 @ take off

wow wow wow thoes motors sing at that speed.the only thing that is wrong is the boat.you should have the motors on a ray glass protector or a naiad.i told the wellington coast guard to get the F350A when they where looking for there new mtors but they got suzis F300 V6.the boat is 12 ton and dose 36 knotes into a head wind of 25 knots with the motors at %35 tilt

@fensta01 Which manufacturer is your RIB?? Check my vids - got the same engine setup..

Faster!

cmon you 350s lol. Fast vid

The only good sounding four stroke outboard. But check out the sound of these Evinrude G2s when they hit the throttle: kzfaq.info/get/bejne/aJmThpWTzNjaZmQ.html

YAMAHA; MOTOR -POPA F 350 HIGH SPEED ……………YAMAHA OUTBOARDS …MUITA. POTÊNCIA!!!… PARABÉNS 🎊🎉🍾👍👏👏👏👏🎈😁👍 YAMAHA ………………………OK!!!!………………………………………………

seven marine outboard ftw has 557 hp

thats 70k worth of engines right there if you put 3 60 hp's you would probably get similar results much cheaper

40lt an hour $40,000 AU

they cost $50+ grand at my work!

Man! Can it get any better than that?

lol like a w16 bugatti

tshhh.. that is nothing. i will even go faster is i am on my bike.... XD damn nice boat..

but this uses a shitload of gas and weighs almost 900 lbs. per engine

2 XS 300 Mercury Optimaxes weigh the same as these one of these hogs and the mercs get better fuel economy and will blow the hogs out of the water!