Seachoice 50-21013 Full-Flow Oil Filter – 20 Micron | Honda BF Outboard
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Seachoice 50-21013 – 20-Micron Full-Flow Oil Filter
Part Number: Seachoice 50-21013 (ref: 21013)
Brand: Seachoice
System: Lubrication – Engine Oil Filtration
Supersedes / Cross-References: Sierra 18-7909 | Honda 15400-POH-305PE | 15400-POH-305 | 15400-ZJI-004 | 15400-PLM-A01PE | 15400-PLM-A02
Overview
The Seachoice 50-21013 is a full-flow, spin-on oil filter built for Honda four-stroke outboard engines. Its 20-micron cellulose element captures contaminants before they reach bearings and other lubricated engine components. An epoxy-coated canister and heavy-duty end-cap seals make it well-suited to the corrosive marine environment.
Key Features
- 20-micron full-flow filtration — traps large particles early in the oil circuit
- High-efficiency cellulose filter element — reliable filtration across normal service intervals
- Anti-drain-back valve — preserves oil pressure at startup so bearings receive lubrication immediately
- Epoxy-coated canister — corrosion resistance in saltwater and freshwater marine use
- Reinforced canister construction — structural integrity under operating pressure
- Heavy-duty end-cap seals — reduced risk of bypass or leakage
Compatible Applications
- Honda BF-series four-stroke outboards using Honda filter families POH, ZJI, or PLM
- Replaces Honda OEM filters: 15400-POH-305PE, 15400-POH-305, 15400-ZJI-004, 15400-PLM-A01PE, 15400-PLM-A02
- Direct replacement for Sierra 18-7909
Confirm your Honda engine model, horsepower, model year, and existing oil filter part number before ordering. Honda uses more than one filter size across its four-stroke outboard range — engine model and serial number will identify the correct filter.
Service Interval
Replace the oil filter at every engine oil change, following the interval specified in your Honda outboard owner's manual. Regular oil filter replacement prevents contaminants from circulating through bearings and other lubricated engine components.
Installation Notes
Remove the old filter and verify its sealing gasket came away with it. Clean the mounting surface, apply a light coat of clean engine oil to the new gasket, and thread the filter on by hand until snug. Run the engine after installation and inspect around the filter for any seepage.
Cross-Reference Part Numbers
- Seachoice: 50-21013 / 21013
- Sierra 18-7909
- Honda: 15400-POH-305PE
- Honda: 15400-POH-305
- Honda: 15400-ZJI-004
- Honda: 15400-PLM-A01PE
- Honda: 15400-PLM-A02
Parts Desk Insights
This filter is the go-to choice for Honda BF-series four-stroke outboard oil changes. It covers five Honda OEM part numbers across three filter families (POH, ZJI, PLM), making it one of the broadest-fitting Honda outboard oil filters available. The fastest way to confirm compatibility is to match the Sierra 18-7909 cross-reference or one of the Honda OEM numbers above — physical appearance alone is not a reliable fit check, as Honda uses a second filter size on certain BF models. When in doubt, pull the engine model and serial number before ordering.
UPC: 719249210131
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.
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