Water Separating Fuel Filter Disc – Fits Mercury/MerCruiser Gen III (Replaces 35-892665, 8M0204703)
Water Separating Fuel Filter Disc – Fits Mercury/MerCruiser Gen III (Replaces 35-892665, 8M0204703) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Separating Fuel Filter Disc – Fits Mercury/MerCruiser Gen III...
Product Details
This Water Separating Fuel Filter Disc is engineered for Mercury/MerCruiser sterndrive and inboard engines from 2004 and newer that are equipped with Gen III fuel cooler systems. It is a critical component for maintaining a clean fuel supply, protecting your engine from water and contaminants.
This part is a direct replacement, providing an aftermarket interchange for Mercury/Quicksilver part numbers 35-892665 and 8M0204703, as well as Sierra part 18-7715.
- Replacement element for your engine's fuel filtration system.
- Installs directly into Gen III fuel cooler assemblies.
- Designed for use with gasoline fuel systems.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number | Superseded By | Notes |
|---|---|---|---|
| Mercury / Quicksilver | 35-892665 | 8M0204703 | Original OEM part number. |
| Mercury / Quicksilver | 8M0204703 | Current OEM part number. | |
| Sierra | 18-7715 | Aftermarket cross-reference. |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This fuel filter is specifically for MerCruiser models equipped with the Gen III fuel cooler.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | Sterndrive & Inboard Engines with Gen III Fuel Cooler | 2004–newer | 35-892665 / 8M0204703 | Original part 35-892665 superseded by 8M0204703 |
Technical Specs
- Product Type
- Water Separating Fuel Filter Disc
- Installation
- Gen III Fuel Cooler Systems
- Fuel Type
- Gasoline
- Warranty
- 1 Year
- Other Technical Attributes
- Replacement element for fuel filtration system
What’s in the Box
- 1 x Water Separating Fuel Filter Disc (Replaces 35-8M0204703 / 35-892665)
Installation Notes
- Turn off the engine and allow it to cool completely.
- Shut off the fuel supply valve and disconnect the battery.
- Carefully relieve any pressure in the fuel system according to your service manual.
- Place absorbent rags or a container below the fuel cooler to catch any spilled fuel.
- Note the hose connections, then carefully disconnect the fuel lines from the filter housing.
- Remove the housing or cover to access the old filter disc.
- Take out the old filter disc and any associated gaskets or seals.
- Install the new fuel filter disc, ensuring it is seated correctly.
- Replace any gaskets or seals as needed and reassemble the housing.
- Reconnect the fuel lines, restore the fuel supply, and reconnect the battery.
- Prime the fuel system as per your engine's manual.
- Start the engine and carefully inspect for any leaks.
Troubleshooting & FAQ
How do I know if this filter fits my engine?
This filter is specifically for 2004 and newer Mercury/MerCruiser sterndrive and inboard engines that use a Gen III fuel cooler system. The most reliable way to confirm fitment is to check your existing part number. This disc replaces OEM numbers 35-892665 and 8M0204703, and the Sierra aftermarket part 18-7715.
What is the difference between part number 35-892665 and 8M0204703?
The part number 35-892665 was the original OEM number from Mercury. It has been officially superseded by the new number, 8M0204703. Both numbers refer to the same part, and they are functionally identical and completely interchangeable.
What are the signs of a failing fuel filter?
Common symptoms of a clogged or failing fuel filter include engine hesitation, sputtering, difficulty starting, a rough idle, or a noticeable loss of power, especially under acceleration. If you experience these issues, a blocked filter is a likely cause.
How often should I replace this fuel filter disc?
As a general maintenance guideline, you should replace your water-separating fuel filter annually or after every 100 hours of engine use, whichever comes first. Always consult your engine's service manual for the manufacturer's recommended maintenance schedule.
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.
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