F250 4.2L V6
332HO DIY KIT
2010 to 2021

USD $1,699.00USD $4,396.00

Go Further, Go Faster, with Nizpro.

Optimize Speed, Maximize Power, and achieve Peak Efficiency.

Unleash the full potential of your Yamaha F250 with the Nizpro Marine 332HO Performance Repower. This innovative upgrade boosts power while also reducing fuel consumption, delivering the performance you need without compromising engine efficiency. Theย Nizpro Marine 332 HO Repower is the ideal, cost-effective performance enhancement for your Yamaha F250 SHO 4.2L engine. Whether you're cruising through the waves or tackling tougher conditions, this upgrade provides the perfect balance of power, fuel economy, and reliability.

A Nizpro Marine Performance Repower is about optimising the performance of your engine. It’s not about turning your boat into a rocket ship – that’s what we made Nizproย 475 Lightning, 500 Bandit & 525 Outlawย ย Superchargers for!

Use the DIY Repower Kit to easily flash your ECU! Upgrading to a Nizpro Marine Performance Repower, your Yamaha F250 OFFSHORE will make 332hp with a 6,500rpm Rev Limiter and extra torque to get your boat up and out of the water faster.

Increased Power, Improved Economy & Reliability? It’s all true!

Testing: We have rigorously tested the Nizpro Marine 332HO Performance Repowers on a standard Yamaha F250 OFFSHORE engine utilizing the Nizpro Marine Endurance Test on our inhouse dyno cell. The engine passed with no adverse effects*.

The same engine has also been extensively water tested for 250+ hours to further validate the dyno results. These tests underpin the performance of the hundreds of engines currently in market using the Nizpro Marine 332HO Performanceย  Repower & are undertaken to ensure complete confidence in the Nizpro Marine 332HO Performance Repower.

*Performance Caveat:

Engine must use Minimum 89 AKI US gas /95 RON AUS Octane fuelย & have adhered to recommended Yamaha service intervals.ย 

 

Please note that all NIZPRO ECU Flashing Software is ONLY compatible with Windows Computers.

Suitable for

  • Yamaha OFFSHOREย  ย  ย  ย  ย  ย  2010ย  to 2021

 

*Performance Caveat:

Engine must use Minimum 89 AKI US gas /95 RON AUS Octane fuel & must have adhered to recommended Yamaha service intervals.ย 

STOCK YAMAHA F250 OFFSHORE VS NIZPRO 332HO Performance Repower
โ€ข Power increase to 332 hp
โ€ข 21% Torque increase to 327Ftlbs
โ€ข Nizpro Performance 6500 RPM Limiter
โ€ข Improved fuel economyย up to an average of 15.5%ย over stock

*Performance Caveat:

Engine must use Minimum 89 AKI US gas /95 RON AUS Octane fuel & must have adhered to recommended Yamaha service intervals.ย 

 

DIY Kit includes

  • ECU Flash Interface & USB Cable
  • AC Flash Power Supply โ€“ Region Specific
  • 12V DC Power Cable
  • Offshore V6 Flash Harness
  • 2 x 332 HO Nizpro Decals per engine
  • 1 x 332 HO Performance Repower Licence per engine
  • Nizpro Trucker Cap
  • Nizpro USB preloaded with Instructions

NIZPRO – Yamaha 4.2L V6 OFFSHORE ECU Flashing Instructions

 

*Performance Caveat:

Engine must use Minimum 89 AKI US gas /95 RON AUS Octane fuelย & have adhered to recommended Yamaha service intervals.ย 

I recently had the Nizpro 332HO Performance Repower with the Yamaha stock 6200rpm rev limiter installed on my Yamaha F250s by Sage from Fathom Marine and I could not be more happier with the results.

Heading offshore any day before the tune with a head swell trim tabs buried, I was averaging 1.2 MPG.

With the tune, same conditions, I am now averaging 1.5 to 1.8 mpg. The better fuel economy is what I was after and for just a bonus, I also gained some top end speed.

So if you are looking for a tune to improve your fuel economy and add extra speed, do not hesitate to do it.

I run a Pursuit 28 foot center console offshore boat and believe me itโ€™s heavy but since the tune it has made the boat a whole different machine .

Once I got the props dialed in and settled with a set of power tech four blades, that was the only change I had to make. Great work and thank you, Sage.๐Ÿ”ฅ

Brent H, North Carolina USAย  12/01/2025