Seachoice 50-20901 Fuel/Water Separator Kit – 28 Micron | 3/8 in. NPT | Gasoline Engines
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Seachoice 50-20901 – Marine Fuel/Water Separator Kit | 28 Micron | 3/8 in. NPT Ports
Part Number: 50-20901 | Reference: 20901
Brand: Seachoice
Type: Fuel/Water Separator Kit
Filtration: 28 Micron
Ports: Universal 3/8 in. NPT
Application: Most 2-Stroke & 4-Stroke Gasoline Marine Engines
UPC: 719249209012
Water in your fuel system is one of the most common causes of hard starting, rough running, and engine damage on the water. The Seachoice 50-20901 removes water and particulate contaminants to 28 microns before they reach your engine, protecting carburetors and downstream fuel-system components. This is a complete kit — includes the separator filter, a powder-coated mounting bracket, and two brass port plugs for unused connections.
Kit Contents
- 28-micron fuel/water separator filter
- Powder-coated mounting bracket
- Two brass plugs for unused 3/8 in. NPT ports
Compatible Applications
- Most 2-stroke gasoline outboard and inboard marine engines
- Most 4-stroke gasoline outboard and inboard marine engines
- Any gasoline marine application using 3/8 in. NPT fuel connections
Fitment Notice: Confirm your vessel’s fuel-line configuration, mounting location, and 3/8 in. NPT connection requirement before installation. For gasoline engines only — not suitable for diesel applications. Install where the filter assembly remains accessible for regular inspection and element service.
When to Service
- Replace the filter element as part of annual or seasonal fuel-system maintenance
- Inspect and service sooner if water contamination, excessive debris, or restricted fuel flow is suspected
- Any time hard starting or rough running may be related to fuel quality
Installation Notes
- Mount the bracket in an accessible, protected location in the engine compartment
- Connect the fuel supply using compatible marine-rated fuel fittings and hose
- Plug unused ports with the supplied brass plugs
- Prime the fuel system and inspect all fittings and filter seals carefully for leaks before operating the engine
- Follow the fuel-flow direction indicated on the filter housing
Cross-Reference Part Numbers
- Seachoice: 50-20901 / 20901
- Valmar: 52103
- Sierra: 18-7848-1
- Moeller: 033320-10
- Mercury/Quicksilver: 35-802893Q4
- UPC: 719249209012
Related Products
- Seachoice 10-Micron Fuel/Water Separating Filter Element — 2 & 4 Stroke Outboards
- Seachoice 10-Micron Fuel/Water Separating Filter Element — Racor, Moeller, Mercury, Volvo
- Seachoice 10-Micron Fuel/Water Separating Filter Element — Sierra, OMC, Racor
- Seachoice Clearchoice 10-Micron Water-Separating Fuel Filter Kit
- Seachoice 22306 Replacement Clear Bowl Kit for Fuel/Water Separators
- Seachoice 22308 Stainless-Steel Fuel/Water Separating Filter Bracket
Parts Desk Insights
The 50-20901 is a complete separator kit — not just a replacement filter element — which makes it the right starting point when building a new fuel-filtration setup on a vessel that doesn’t already have a separator installed. The two key specs are the 28-micron filtration and 3/8 in. NPT ports. For ongoing maintenance, replacement filter elements are available separately — see the 10-micron outboard element or the Racor/Moeller/Mercury compatible element depending on your application. The most common installation mistake is not plugging unused ports, which will introduce air into the fuel system — always use the included brass plugs on any open ports.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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