Nizpro Marine's 633-Horsepower Supercharged Yamaha

Published on 05-30-2023 03:11 AM

11 Comments

The World's Most Powerful Outboard ▼

Nizpro Marine created this 633-horsepower supercharged monster, and You all need to check this out because I am blown away. They focus on upgrades and modifications to Yamaha outboards and they developed the superchargers for those engines entirely in-house. The engineering involved is phenomenal. Here's the description of the 633R from their YouTube page:

Nizpro Marine has developed the worlds most powerful outboard.

You start with Yamaha’s brilliant, and dare we say venerable 4.2l V6. You add a custom plenum (hence the red alien), separate, additional raw water cooling, and Eaton’s R1900 supercharger on top. Yet the really brilliant effort is in the re-map of the factory brain.

Now the 633RR adds a bigger pulley, new injectors, forged pistons, new valve springs, ported heads, and billet conrods, then some other more incidental bits too like throttle body and injectors, as well as a new drive leg. All very cool stuff, and the reason the whole thing is as bullet proof as the standard 300hp from Yamaha.

_{This article was originally published in forum thread:

Nizpro Marine's 633-Horsepower Supercharged Yamaha
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11 Comments

FMP - 06-01-2023, 12:04 PM
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Next 200APX Merc...

tpd321 - 06-01-2023, 03:26 PM
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I'm a 2-stoke guy thru and thru, but like MotoCross Dirtbikes and street bikes 4-strokes tech is coming on fast and powerful.
Undeniable power capabilities

DeudeMann - 06-14-2023, 08:01 AM
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"they developed the superchargers for those engines entirely in-house"
also
"Eaton’s R1900 supercharger on top. "

davidson02 - 11-29-2023, 08:49 PM
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Nice built.
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katesharma - 03-06-2024, 02:39 PM
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That sounds absolutely incredible! Nizpro Marine's creation, the 633R, seems like a powerhouse of engineering. The level of detail they've put into modifying Yamaha outboards is impressive, especially with the in-house development of superchargers. It's fascinating to see how they've enhanced the V6 engine with custom components like the plenum and the Eaton R1900 supercharger, along with additional cooling and a meticulous re-map of the factory brain. Swimming Pool Contractors Raleigh NC

PaulZ - 03-12-2024, 07:41 PM
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That's impressive! The Nizpro Marine 633RR sounds like a real beast of an outboard motor. Roofing Companies in Northern Kentucky

David - WI - 03-12-2024, 07:46 PM
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Originally Posted by tpd321

I'm a 2-stoke guy thru and thru, but like MotoCross Dirtbikes and street bikes 4-strokes tech is coming on fast and powerful.
Undeniable power capabilities

Yes, as long as you allow them more displacement, weight, and cost; they are competitive!