Sierra 7721 In-Line Fuel Filter
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Sierra 7721 In-Line Fuel Filter (SKU 47-7721) helps protect marine fuel systems by filtering fuel before it reaches the engine’s injection or carburetion components.
Key Features
- In-line fuel filter design for marine fuel system protection
- Sierra fuel filtration used for MPI/EFI engines with a fuel boost pump (per Sierra application listing for 18-7721)
- Helps reduce debris from reaching downstream fuel system components
Product Compatibility
- Marine gasoline engines with fuel injection (MPI/EFI) and an electric fuel boost pump
- Fuel systems that require an in-line fuel filter installed in the fuel line before the boost pump inlet (application guidance varies by engine/fuel line configuration—confirm with your service diagram)
Product Details
- Brand: Sierra
- Model/Part number shown in product title: 7721
- SKU: 47-7721
- Product type: In-line fuel filter
- Weight: 145 grams
Parts Desk Insights
Best Use Case: A practical choice when you need an in-line fuel filter element/body to help keep debris out of the fuel system feeding MPI/EFI components on engines equipped with a boost pump.
Common Issues: Aftermarket swaps can be mismatched by fuel-line routing or hose I.D.; always confirm the correct placement in the fuel line on your engine’s service diagram and double-check that the mating fuel fittings/line sizes match.
Related Products & Accessories
Browse related Fuel Filters to complete the installation.
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.