Yamaha V6 4.2L SHO VF200/225/250 ECU Tune (Mail-In)


ENGINE MODEL: VF200
ECU ID: 6CD-XX
Price:
$949.99
Stock:
In stock

Unleash the True Power of Your Yamaha V6 4.2L SHO

The Mealey Marine Outboard EFI Mail-In ECU Tune transforms the Yamaha 4.2L V6 SHO (200 / 225 / 250) into a 325-horsepower machine. This calibration unlocks the full performance potential of Yamaha’s top-tier V6 platform—delivering up to +125HP and as much as 15 % better fuel economy—all while maintaining OEM-level reliability and drivability.

Your order automatically includes a prepaid inbound shipping label and packing instructions, so sending your ECU is simple and secure.

Performance Gains

  • HP Gain: Up to 325 HP (setup-dependent)
  • Rev Limit Increase: From 6150 to ~6500 RPM
  • Throttle Response: Sharper and more immediate throughout the range
  • Top Speed: Significant gains with the correct prop and load
  • Fuel Efficiency: Improved mid-range economy at cruising RPM

Fuel, Compatibility & Supported Models

  • Fuel Required: 93 Octane Recommended (91 Minimum)
  • Tuneable Years: 2010–Present
  • Engines: Yamaha VF200, VF225, and VF250 SHO V6 4.2L
  • ECU IDs: 6CD-XX 6LG-XX 6CC-XX 6HB-XX 6KX-XX 6CB-XX 6FR-XX 6LF-XX
  • Configuration: DOHC, 6 Cyl, 4.2L (≈4169cc)

Why Tune with Mealey Marine

  • Custom calibrations built on proven Outboard EFI software and testing
  • Bench-tested read/write process with checksum verification
  • 1–2 Business Day Turnaround once your ECU is received
  • Backed by Marine Technicians who install, service, and run these engines daily
  • Safe, reliable power built for performance fishing and recreational boats alike

How the Mail-In Process Works

  1. Order this tune. You’ll automatically receive a prepaid inbound shipping label and packing instructions.
  2. Ship your ECU to Mealey Marine in Houston, TX. Label it with your Order # and include your boat details and fuel grade.
  3. We tune your ECU using Outboard EFI calibration software, test and verify it, then ship it back to you.
  4. Reinstall and run. You’ll notice faster holeshot, stronger midrange torque, and higher RPM with stock reliability.
Multiple ECUs? Get 15% off automatically per ECU in the same order. You’ll receive one label for all ECUs—ship together for fastest turnaround.

Before You Ship

  • ECU should be in good physical condition with matching ID.
  • Engines must be mechanically sound and properly maintained.

Results You Can Feel

Expect a crisper throttle, stronger hole-shot, and a boat that feels “lighter” and faster on plane. Customers typically report 2–4 MPH top-end gains and a flatter torque curve that carries load better under real-world conditions.

Questions?

Call or message Mealey MarineMarine Problem Solvers. We’ll help you confirm ECU compatibility and advise on prop, load, and fuel setup to get the best performance possible.

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