Seachoice 50-20938 Fuel/Water Separating Filter – Volvo/OMC – 10 Micron
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Seachoice 50-20938 – 10-Micron Fuel/Water Separating Filter
Part Number: 50-20938 (also referenced as 20938)
Brand: Seachoice
Filtration Rating: 10 micron
Filter Type: Spin-on fuel/water separator
UPC: 719249209388
Overview
The Seachoice 50-20938 is a 10-micron spin-on fuel/water separating filter for selected Volvo Penta, OMC, and Johnson marine fuel systems. A water-shedding cellulose element removes water and fine particulate contamination before fuel reaches the engine, while a corrosion-resistant coated steel canister stands up to the demands of marine service.
Key Features
- 10-micron cellulose filter element for effective fuel/water separation
- Water-shedding media design delivers cleaner, drier fuel to the engine
- Coated steel canister resists corrosion in marine environments
- Spin-on design for straightforward servicing
- Suitable for 2-stroke and 4-stroke outboard engines
Compatible Applications
- Selected Volvo Penta marine fuel systems
- Selected OMC / Johnson marine fuel systems
- Always confirm the existing filter number and filter-head application before ordering — thread pitch, gasket diameter, and micron rating must match
- Fitment note: Seachoice lists both 50-20937 and 50-20938 as Volvo/OMC 10-micron filters. Use the OEM or Sierra cross-reference numbers below to confirm which filter is correct for your application.
Service Interval
Replace at the engine manufacturer's recommended interval, or sooner if water contamination in the bowl, restricted fuel flow, or degraded engine performance indicates the filter is loading up.
Installation Notes
- Shut off the fuel supply before beginning service
- Remove the old filter and inspect the sealing surface for debris or damage
- Lightly lubricate the new gasket as specified, then install hand-tight per the filter-head manufacturer's procedure
- Restore fuel supply and inspect carefully for leaks before starting the engine
Cross-Reference / Alternate Part Numbers
- Seachoice: 50-20938 / 20938
- Sierra: 18-7789
- Volvo Penta: 3852413
- Volvo Penta: 3851218
- Johnson / OMC: 5009676
Dimensions & Weight
- Weight: approx. 349 g (0.77 lb)
- Refer to filter-head specifications for thread size and gasket diameter requirements
Parts Desk Insights
Best Use Case: This filter is the right choice when your existing filter or your engine service manual cross-references Sierra 18-7789 or Johnson/OMC 5009676. It's particularly well-suited for Volvo Penta and OMC sterndrive and inboard applications running on gasoline where water contamination is a known concern.
Common Issues: The most common question is telling 50-20938 apart from the visually similar Seachoice 50-20937. The safest approach is to match against the Sierra cross-reference: 50-20938 = Sierra 18-7789; 50-20937 = Sierra 18-7989. Filters can clog faster in boats that sit over the off-season or operate in humid conditions — keep a spare on board.
Related Products
- West Marine Fuel/Water Separating Filter — Sierra 18-7789 — direct Sierra cross-reference for this filter
- Seachoice 50-20937 Fuel/Water Separating Filter – 10 Micron — companion filter; confirm Sierra cross-ref before substituting
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
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.