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A 2-plug adapter harness for installing a FuelTech FT550 ECU on 2018–2025 Yamaha 1800/1900 WaveRunners. It connects the ECU to the watercraft with minimal rewiring and opens up the FT550's full feature set — fuel and ignition control, data logging, boost control and real-time tuning — for race and high-performance use.
FuelTech lists 2018–2025 Yamaha VX HO 1900 models as the application; the installation manual is written for the 2018-on Yamaha 1800 SVHO/HO.
Covered by a 1-year worldwide warranty.
FuelTech FT550 Yamaha 1800 2-plug adapter harness manual (PDF)
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