Full-Flow Oil Filter | 20-Micron | Seachoice 50-21009
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Seachoice 50-21009 Full-Flow Oil Filter is a direct-fit replacement for Honda and Mercury four-stroke outboard engines. Built to meet or exceed OEM specifications, it delivers reliable 20-micron oil filtration engineered for the demands of marine operation.
Key Features
- 20-Micron filtration — captures large contamination particles before they reach lubricated engine components
- High-efficiency cellulose filter element — extends service intervals and reduces flow restriction
- Epoxy-coated canister — resists corrosion in saltwater and marine environments
- Thicker body construction — improved structural integrity under pressure
- Heavy-duty end cap seals — enhanced leak resistance
- Anti-drain back valve — maintains oil pressure at startup
- Manufactured in an ISO/TS 16949 certified facility — meets or exceeds industry quality standards
Parts Desk Insights
Best suited for routine oil changes on Honda BF-series and Mercury FourStroke outboards. The two Mercury part numbers here (35-822626Q03 and 35-822626Q1) are earlier production revisions of the Mercury 822626 filter family — if your engine calls for a later revision (Q15 or T7), see the Seachoice 50-21011 instead. Honda also uses multiple filter sizes across its BF lineup — always confirm fitment against your engine model and serial number before ordering. Cross-references: Sierra 18-7913 | Honda 15400-PFB-014 | Mercury 35-822626Q03 / 35-822626Q1.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 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.