Fuel/Water Separating Filter – Fits Mercury & MerCruiser Engines (Replaces 35-802893Q01)
Fuel/Water Separating Filter – Fits Mercury & MerCruiser Engines (Replaces 35-802893Q01) 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.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Fuel/Water Separating Filter – Fits Mercury & MerCruiser Engine...
Product Details
This Fuel/Water Separating Filter – Fits Mercury & MerCruiser Engines (Replaces 35-802893Q01) is designed for use in a wide range of Mercury outboard engines (including Mercury, Mariner, and Force models) and MerCruiser sterndrive/inboard applications. Its 25-micron filtration media effectively removes damaging contaminants and water from gasoline fuel systems, ensuring reliable engine performance.
It serves as a direct interchange for several part numbers, including Mercury 35-802893T and 35-802893Q01, Sierra 18-7845, and BOLEWIN 35-807172, 35-60494-1, and 35-802893Q01.
- Features a 25-micron rating to effectively remove water and other impurities from fuel.
- Designed for simple spin-on installation for quick and reliable servicing.
- Includes a new rubber gasket to ensure a complete, leak-free seal.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 35-802893T |
| Mercury | 35-802893Q01 |
| Sierra | 18-7845 |
| BOLEWIN | 35-807172 / 35-60494-1 / 35-802893Q01 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury, Mariner, and Force outboards, this filter is widely compatible except for specific models noted in the table.
For MerCruiser sterndrive/inboard engines, this filter fits most applications, with exceptions for models like the 4.3L Gen II (1992).
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner/Force | All Outboards | Various | 2-Stroke & 4-Stroke | Various | 35-802893Q01 | Except special cases noted below |
| MerCruiser | All Sterndrive/Inboard | Various | 4-Stroke | Various | 35-802893Q01 | Except special cases noted below |
| MerCruiser | 4.3L Gen II | Various | 4-Stroke | 1992 | Not compatible - uses inline filter | |
| Mercury | 1.6L Vazer | Various | 4-Stroke | Various | Not compatible | |
| Mercury | 3.0L MPI | Various | 4-Stroke | Various | Not compatible |
Technical Specs
- Product Type
- Fuel/Water Separating Filter
- Installation
- Spin-On
- Filtration Rating
- 25 micron
- Fuel Type
- Gasoline
- Connection
- Direct Thread
- Housing Material
- Polyester/cellulose/glass fiber with phenolic binder, silicon coating
- Housing Color
- White
- Dimensions
- Height: 10.5 cm (4.13 in), Width: 10.5 cm (4.13 in), Length: 10.5 cm (4.13 in)
- Weight
- 0.51 kg (1.12 lbs)
- Fitting Type
- Spin-On
- Thread Size
- 11/16-16
- Other Technical Attributes
- Part of Mercury Quicksilver brand
What’s in the Box
- 1 x Fuel/Water Separating Filter (35-802893Q01)
- 1 x Rubber Gasket (included with filter)
Installation Notes
- Shut off the fuel supply. Place a catch pan under the old filter to collect any spilled fuel.
- Unscrew and remove the old filter canister, using a filter wrench if necessary.
- Carefully clean the filter mounting base on the engine, ensuring the old gasket is completely removed.
- Apply a thin layer of clean motor oil or grease to the gasket on the new filter.
- Spin the new filter onto the mounting base by hand until the gasket makes firm contact.
- Tighten the filter an additional 3/4 to 1 full turn by hand. Do not use a wrench to tighten.
- Restore the fuel supply, prime the system as needed, and carefully check for any leaks before starting the engine.
Troubleshooting & FAQ
How do I know if this filter fits my engine?
Consult the Engine & Model Compatibility table on this page. It is crucial to match your engine's brand, model, and year. This filter is a direct replacement for part numbers like Mercury 35-802893Q01 and Sierra 18-7845.
What are the signs of a clogged fuel filter?
Common symptoms include engine hesitation under load, loss of power, stalling, or difficulty starting. If you notice these issues, inspect and replace your fuel filter as part of your diagnosis.
How often should this fuel filter be replaced?
As a general rule, replace your fuel/water separating filter every 100 hours of operation or at least once per year, whichever comes first. Always consult your engine's service manual for the recommended maintenance schedule.
What is the micron rating and why does it matter?
This filter has a 25 micron rating. This specification indicates the size of particles it can capture, making it effective at removing common contaminants and separated water from gasoline that could otherwise harm your engine's fuel system.
Is a special tool needed for installation?
A standard filter wrench is often helpful for removing the old, tightened filter. However, the new filter should only be tightened by hand to avoid damaging the canister or seals.
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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