Inline Fuel Filter – Fits Mercury/Mariner 9.9-50HP Outboards (Replaces 35-8M0088825, 853733A2, 853733T02, 853733T03, 898101T68)
Inline Fuel Filter – Fits Mercury/Mariner 9.9-50HP Outboards (Replaces 35-8M0088825, 853733A2, 853733T02, 853733T03, 898101T68) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Inline Fuel Filter – Fits Mercury/Mariner 9.9-50HP Outboards (Repla...
Product Details
This aftermarket Mercury Inline Fuel Filter is designed for a wide range of Mercury and Mariner 4-stroke outboard engines, from 9.9HP to 50HP. It ensures clean fuel delivery by filtering out contaminants, protecting your engine and maintaining performance. Please verify compatibility using your engine's serial number against the chart below.
It serves as a direct replacement for Mercury OEM part numbers 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, and 35-898101T68.
- Installs directly into the fuel line.
- Engineered for use with standard gasoline.
- Includes one complete fuel filter assembly.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 35-8M0088825 |
| Mercury | 35-853733A2 |
| Mercury | 35-853733T02 |
| Mercury | 35-853733T03 |
| Mercury | 35-898101T68 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mariner engines, fitment is determined by serial number. Ensure your engine's serial number falls within the specified range for proper compatibility.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | 9.9HP | 9.9 | 4-Stroke | 0N059858 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Air Silencer and Fuel Lines |
| Mercury | 15HP | 15 | 4-Stroke | 0N055285 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Air Silencer and Fuel Lines |
| Mercury | 18HP | 18 | 4-Stroke | 0N055285 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Air Silencer and Fuel Lines |
| Mercury | 25HP Sea Pro | 25 | 4-Stroke | 0R051710 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Maintenance Kits |
| Mercury | 25HP EFI | 25 | 4-Stroke | 0R106999 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Maintenance Kits, Fuel Pump |
| Mercury | 25HP EFI JET | 25 | 4-Stroke | 0R165086 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Maintenance Kits, Fuel Pump |
| Mercury | 25HP JET | 25 | 4-Stroke | 0N088578 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Fuel Pump |
| Mercury | 30HP | 30 | 4-Stroke | 0N055505 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Fuel Pump |
| Mercury | 30HP EFI | 30 | 4-Stroke | 0R106999 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Maintenance Kits, Fuel Pump |
| Mercury | 40HP | 40 | 4-Stroke | 0N056165 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Fuel Line |
| Mercury | 40HP Lightning XR | 40 | 4-Stroke | 0N056165 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Fuel Line |
| Mercury | 50HP, 50MH | 50 | 4-Stroke | 0N056165 & Up | 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68 | Fuel Line |
Technical Specs
- Product Type
- Inline Fuel Filter
- Installation
- In-line on fuel hose
- Fuel Type
- Gasoline
- Housing Color
- Black
What’s in the Box
- 1 x Fuel Filter Assembly (Replaces 35-8M0088825, 35-853733A2, 35-853733T02, 35-853733T03, 35-898101T68)
Installation Notes
- Turn off the engine and shut off the fuel supply valve.
- Place a rag or container under the old filter to catch any fuel spillage.
- Loosen the hose clamps on both sides of the existing fuel filter.
- Carefully remove the old filter, noting the direction of the fuel flow arrow printed on its housing.
- Install the new filter, ensuring the flow arrow points in the same direction (towards the engine).
- Securely tighten the hose clamps on the new filter.
- Turn the fuel supply back on and check for any leaks around the connections before starting the engine.
Troubleshooting & FAQ
How do I know if this filter fits my engine?
Fitment is based on your engine's serial number, not just its model or year. Please compare your serial number to the ranges listed in the "Engine & Model Compatibility" table to ensure a perfect match.
What are the signs of a clogged fuel filter?
Common symptoms include the engine sputtering or running rough, a noticeable loss of power, difficulty starting, or stalling at low speeds. These issues occur because the engine isn't receiving enough fuel.
How often should this fuel filter be replaced?
As a best practice, replace your inline fuel filter annually or every 100 hours of operation, whichever comes first. Always consult your engine's service manual for the recommended maintenance schedule.
What is the arrow on the filter housing for?
The arrow indicates the direction of fuel flow. It must point from the fuel tank towards the engine for the filter to function correctly. Installing it backward can restrict fuel flow and damage the engine.
Can I clean and reuse this filter?
No, this is a disposable inline filter. It is designed to be replaced, not cleaned. Attempting to clean it can damage the filter media and fail to remove trapped contaminants.
Is there a difference installing this on an EFI vs. a carbureted engine?
The basic installation process is the same for both. However, EFI (Electronic Fuel Injection) systems are often more sensitive to fuel contamination and pressure, making regular filter changes even more critical for optimal performance.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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