Dyno data.
Real Nizpro Marine DynoLog test data for the V8 5.3L Offshore ECO platform. Stock factory output below, Nizpro Tuned output above. Power and torque across the full rev range — no marketing curves, no projections.
The 400 ECO Plus calibration for the F350 5.3L V8 — Nizpro's economy-focused tune for the legacy V8 platform. Targets ~400 hp with significantly improved cruise fuel economy over stock, and runs on regular pump fuel (87 MON / 91 RON minimum) — no premium required. Different mission than the 425HO Performance Repower: the ECO Plus prioritizes mileage and reliability over peak power, ideal for owners running long distances to the Bahamas or Keys who care more about fuel cost than tournament power.
Real Nizpro Marine DynoLog test data for the V8 5.3L Offshore ECO platform. Stock factory output below, Nizpro Tuned output above. Power and torque across the full rev range — no marketing curves, no projections.
Power gain across the rev range, focused on cruise band.
Real-world cruise fuel economy improvement over stock.
87 MON / 91 RON minimum — no premium fuel required.
Tune stays inside the engine's design envelope.
| Engine Family | V8 5.3L Offshore ECO Plus |
|---|---|
| Fits | Yamaha F350 5.3L V8 Offshore — model years 2010 through 2019. The economy-focused calibration for the legacy big-block V8. |
| Tune Type | Nizpro Marine ECU Performance Repower |
| Output Target | → 400 hp |
| Install | Mobile — at your boat. Most jobs completed same day. |
| Service Area | Miami-Dade · Broward · Palm Beach |
| Reversible | Yes — flash can be reverted to OEM at any time. |
| Required Fuel | 89-octane US pump fuel minimum. |
ECU tuning is a modification, so it can affect Yamaha's warranty position depending on the engine and the specific issue. Nizpro's tunes stay inside the engine's design envelope and are reversible to the OEM calibration at any time, but we always recommend talking to your local Yamaha dealer about your individual situation. We'll give you straight answers — we don't make warranty promises we can't keep.
A minimum of 89-octane US pump fuel is required to run any Nizpro performance tune safely. Premium (91+) is fine and won't hurt anything. Regular 87-octane is not approved — running lower-octane fuel can cause knock and undo the gains the tune is designed to deliver.
Most ECU reflashes are completed the same day. The actual flash takes under an hour — most of the appointment is diagnostics, baseline data logging, and a road test afterward. Plan on a few hours start to finish. Larger installs or troubleshooting can take longer.
Yes. The Nizpro flash can be reverted to the original Yamaha OEM calibration at any time. If you sell the boat, change your mind, or need to take the engine to a Yamaha dealer for unrelated service, we can put it back to factory.
Real-world cruise economy gains typically run 5–20% depending on the engine, the prop setup, the hull, and how you operate. Some Yamaha platforms — like the VF SHO V6 — see published Nizpro test data of up to 27% at cruise. We won't promise a specific number on your boat until we know your setup, but the range is consistent and well-documented across hundreds of installs.
We're Yamaha specialists exclusively. Nizpro is a Yamaha-only performance shop, and that focus is part of why their calibrations are so well-developed. If you've got a Mercury, Suzuki, or Honda outboard, we're not the right shop — we'll tell you that honestly.
Tune pricing varies by engine family — a 4-cylinder F-series flash and a V8 5.6L Performance Repower are different products at different price points. Call (305) 482-1121 or send us your engine model and year and we'll give you a straight quote.
Tell us your engine model, year, and where the boat is. We'll confirm availability and schedule your mobile install.
Call (305) 482-1121Nizpro Marine performance tunes require a minimum of 89-octane US pump fuel and adherence to Yamaha's recommended service intervals. Performance gains vary by engine model, year, propeller setup, hull configuration, and operating conditions. ECU tuning is a modification — implications for any factory warranty depend on Yamaha and the specific issue.
Yamaha® is a registered trademark of Yamaha Motor Co., Ltd. Nizpro® and Nizpro Marine® are registered trademarks of Nizpro Marine Pty Ltd. Performance Tech Marine is an authorized Nizpro Marine dealer and is not affiliated with or endorsed by Yamaha Motor Co., Ltd. All product names, logos, and brands are property of their respective owners.