John L, North Miami Beach USA  17/01/2025

Just made the change to Nizpro 332HO power on my 50’charter boat with quad F250 4.2L V6s.

At our normal 3600 rpm cruise speed, the fuel use has decreased from 36.3 gph to 32.8 gph!!

The power improvement in the midrange even for such a  heavy boat is aslo incredible.

With the tunes costing $899 each plus setup, I am estimating that the Nizpro tunes will recover their cost in around 45 days, could not be happier and would recommend it to anyone!

Brent H, North Carolina USA  12/01/2025

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 it’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.🔥