Seachoice 50-20937 Fuel/Water Separating Filter – 10 Micron
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Seachoice 50-20937 – 10-Micron Fuel/Water Separating Filter
Part Number: 50-20937 (also referenced as 20937)
Brand: Seachoice
Filtration Rating: 10 micron
Filter Type: Spin-on fuel/water separator
UPC: 719249209371
Overview
The Seachoice 50-20937 is a 10-micron spin-on fuel/water separating filter for selected Volvo Penta and OMC marine fuel systems. It uses water-shedding cellulose media and a corrosion-resistant coated steel canister to remove water and fine particulate contamination from gasoline before it reaches the engine.
Key Features
- 10-micron cellulose filter element for effective water and contaminant separation
- Water-shedding media design helps deliver clean, dry fuel to the engine
- Coated steel canister resists corrosion in harsh marine environments
- Spin-on design for straightforward service
Compatible Applications
- Selected Volvo Penta marine fuel systems
- Selected OMC marine fuel systems
- Confirm existing filter number and filter-head application before ordering — thread pitch, gasket diameter, and micron rating must match
Service Interval
Replace at the engine manufacturer's recommended interval, or sooner if you notice water contamination in the bowl, restricted fuel flow, or degraded engine performance.
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 instructions
- Restore fuel supply and inspect carefully for leaks before starting the engine
Cross-Reference / Alternate Part Numbers
- Seachoice: 50-20937 / 20937
- Sierra: 18-7989
- Volvo Penta: 3851218
- Volvo Penta: 3852413
- Volvo Penta: 3862228
- OMC: 502906
- Mercury Marine: 35-8M0154772
Dimensions & Weight
- Weight: 349 g (approx. 12.3 oz)
- Refer to filter-head specifications for thread size and gasket diameter requirements
Parts Desk Insights
Best Use Case: This filter is best suited for boats running on gasoline-powered Volvo Penta or OMC inboard/sterndrive engines where water contamination or fuel quality is a concern. The 10-micron rating provides a good balance of filtration and flow for most recreational marine applications.
Common Issues: The most common customer concern is confirming the correct fit — always cross-check against the existing filter number or one of the listed OEM references (particularly Sierra 18-7989 or the Volvo Penta numbers) before ordering. Filters can load up faster than expected in boats storing fuel over the off-season or operating in humid environments; keep a spare on board.
Related Products
- West Marine Fuel/Water Separating Filter — Sierra 18-7789 — related spin-on filter for comparable marine fuel systems
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.