Replacement Fuel/Water Separator Filter
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Keep your marine fuel system running clean with this Replacement Fuel/Water Separator Filter by Sierra (47-7789). Designed to help trap water and contaminants before fuel reaches the engine, it’s a practical replacement for routine fuel filtration maintenance.
Key Features
- Replacement fuel/water separator filter for marine fuel filtration systems
- Helps separate water and contaminants from incoming fuel to support cleaner engine operation
- Sierra parts support planned maintenance and straightforward filter service
Product Compatibility
- Marine fuel filtration systems that use a Sierra fuel/water separator filter element
- Fuel/water separator service and replacement in outboard, inboard, and sterndrive applications (fitment depends on the specific separator housing/bowl used)
Product Details
- • Brand: Sierra
- • Part: Replacement Fuel/Water Separator Filter
- • SKU: 47-7789
- • Product Type: Fuel Filters
- • Weight (variant data): 313 g
- • Title includes: "Replacement Fuel/Water Separator Filter" (as listed)
Parts Desk Insights
Best Use Case: Best used as part of routine fuel system maintenance for separators that use a compatible Sierra 47-7789 filter element. If your separator has a bowl/drain service procedure, review the correct service manual steps and ensure the mating surfaces are clean before reinstalling.
Common Issues: Common service issues include improper seating of the filter element, stale fuel residue affecting seal surfaces, or forgetting to inspect/clean the separator housing and related seals at the same time. Always check the separator’s diagram and replace any gaskets/O-rings if your service procedure calls for them.
Related Products & Accessories
- Browse Fuel/Water Separators & Fuel Filters - Use this category to match your separator housing and related consumables.
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.