Yamaha F250 Offshore 4.2L Nizpro 332HO ECU Tune (B Series 2021+)

Unlock stronger real-world performance from your Yamaha 4.2L Offshore engine with the Nizpro 332HO calibration, designed to significantly increase horsepower and deliver stronger performance across the entire RPM range.

This calibration is ideal for newer offshore platforms where improved efficiency and power delivery are critical for real-world boating conditions.

Performance Data
Stock Output: 250 HP
Tuned Output: 332 HP
Power Increase: +82 HP

Fuel Savings: Up to 10–15% improved efficiency
Minimum Fuel Required: 89 Octane

What this tune improves

The Nizpro 332HO calibration enhances performance with:

Stronger acceleration
Improved mid-range torque
Better throttle response
Enhanced load handling
Improved cruising efficiency

This results in a more capable and responsive offshore engine.

Compatible Engines

F250  — 2021 to current

ECU Compatibility

6AW
6AX
6AY
6AZ
6BG

How to order

• Select your Service Type
• Select your ECU Part Number (Abridged)
• Complete checkout
• Mail in your ECU or schedule local mobile service if eligible

Service Options

Mail-In ECU Service
Nationwide service available.

Local Mobile Flash Service (Florida)
Available for qualifying local appointments within 40 miles of Ormond Beach, FL.

Important before ordering

If you do not see your ECU listed, select Not Listed / Unsure. We will verify compatibility before flashing.

Notes
Performance results can vary based on hull, prop, load, fuel quality, and operating conditions.