Yanmar 129242-55701 Water Separator Assembly
The Yanmar 129242-55701 water separator is an OEM fuel/water filter designed to protect diesel generator fuel systems by removing water and contaminants before they reach the injection pump. It’s engineered for diesel-powered generator sets utilizing Yanmar 3TNV88, 4TNV84T, and 4TNV94L engines and trusted by professionals for reliable performance.
This UL-listed assembly features a corrosion-resistant aluminum housing with a clear polycarbonate bowl for easy visual inspection and a brass drain valve for quick water removal. It mounts directly to the fuel line and comes complete with a replaceable filter element compatible with standard Yanmar generator panels and enclosures.
- Part Number: 129242-55701 (formerly 129242-55700)
- Compatibility: Yanmar 3TNV88, 4TNV84T, 4TNV94L diesel engines
- Housing: Aluminum body, polycarbonate bowl, brass fittings
- Certifications: UL listed for generator applications
- OEM Quality: Genuine Yanmar part trusted in industrial and standby generators
Please confirm compatibility with your engine’s build list or documentation before purchase.
This part may fit other engines not listed here.


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