Mercury V10 350-400 hp

MacManus99

MacManus99

Joined
Jul 5, 2019
Messages
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Location
STL, MO
Mercury just dropped their new 350-400 hp contenders, with a 5.7L V10 power head.

Verado® 350-400hp Outboard Motor

Verado® - Mercury® 5.7L V10 350 and 400hp Verado® outboards continue the legendary Verado engine family’s legacy of providing premium marine performance. With the strength of the outboard segment's first V10 naturally aspirated powerhead, they deliver extraordinary power and capabilities so you...
www.mercurymarine.com www.mercurymarine.com

I'm curious if this uses the same 64° V design as their 3.4L V6 and 4.6L V8, and they just added cylinders in the middle.

I'm also curious to hear some of your guy's thoughts on how this new outboard will fare against the outgoing supercharged 2.6L L6 power head, as well as against the 350 hp offerings from Yamaha and Suzuki.
 
MacManus99 said:
Mercury just dropped their new 350-400 hp contenders, with a 5.7L V10 power head.

Verado® 350-400hp Outboard Motor

Verado® - Mercury® 5.7L V10 350 and 400hp Verado® outboards continue the legendary Verado engine family’s legacy of providing premium marine performance. With the strength of the outboard segment's first V10 naturally aspirated powerhead, they deliver extraordinary power and capabilities so you...
www.mercurymarine.com www.mercurymarine.com
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Something unusual about spending more for the engine than the entire boat itself cost. Kinda like those people who spend thousands on oversize chrome rims for their $500 donks.
 
MacManus99 said:
Mercury just dropped their new 350-400 hp contenders, with a 5.7L V10 power head.

Verado® 350-400hp Outboard Motor

Verado® - Mercury® 5.7L V10 350 and 400hp Verado® outboards continue the legendary Verado engine family’s legacy of providing premium marine performance. With the strength of the outboard segment's first V10 naturally aspirated powerhead, they deliver extraordinary power and capabilities so you...
www.mercurymarine.com www.mercurymarine.com

I'm curious if this uses the same 64° V design as their 3.4L V6 and 4.6L V8, and they just added cylinders in the middle.

I'm also curious to hear some of your guy's thoughts on how this new outboard will fare against the outgoing supercharged 2.6L L6 power head, as well as against the 350 hp offerings from Yamaha and Suzuki.
Click to expand...
Believe Yamaha no longer offers a 350...now 300 or 425 only. We have the twin 350's...good engine, but some inherent weaknesses; flywheels are essentially a service item.
 
wings&wheels said:
Believe Yamaha no longer offers a 350...now 300 or 425 only. We have the twin 350's...good engine, but some inherent weaknesses; flywheels are essentially a service item.
Click to expand...
It appears you are correct. Thanks for letting me know.

How do flywheels become a service item? (Just out of curiosity). Are they prone to losing teeth?
 
MacManus99 said:
It appears you are correct. Thanks for letting me know.

How do flywheels become a service item? (Just out of curiosity). Are they prone to losing teeth?
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Apparently, there is a potential for a harmonic at, IIRC, 3500-4800 rpm that can damage the flywheel or crankshaft. The engine monitors rpm and alarms when the engines reach 80hrs in that band. Yamaha covers the replacement for the life of the engine supposedly....we haven't reached the interval yet.

Love the engines though; sewing machines at idle and a nice, subdued roar and great push w/ the levers forward.
 
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