Cartridge Fuel Filter for Mercury Mariner 30 40 50 60 HP 879884T
Cartridge Fuel Filter for Mercury Mariner 30 40 50 60 HP 879884T is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Cartridge Fuel Filter for Mercury Mariner 30 40 50 60 HP 879884T
Cartridge Fuel Filter for Mercury Mariner 30 40 50 60 HP 879884T is backordered and will ship as soon as it is back in stock.
Product Details
This Cartridge Fuel Filter – Fits Mercury/Mariner 30-60 HP Outboards (Replaces 35-879884T, 879884T) is designed for Mercury/Mariner 30-60 HP 4-stroke EFI engines, including both 3-cylinder and 4-cylinder models that feature a screw-on filter bowl mounted under the engine cowl. Its 20-micron filtration media effectively removes contaminants to protect your fuel system.
It serves as a direct interchange for Mercury part numbers 35-879884T and 879884T.
- Installs directly under the engine cowl for easy access.
- Features a translucent bowl for quick visual inspection of fuel quality and debris.
- Engineered for gasoline fuel applications in marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 35-879884T |
| Mercury | 879884T |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This filter is designed for specific Mercury and Mariner EFI outboards.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury/Mariner | 3-cylinder EFI | 30-40 | 4-Stroke | 35-879884T | - |
| Mercury/Mariner | 4-cylinder | 40-50-60 | 4-Stroke | 35-879884T | - |
Technical Specs
- Product Type
- Inline Cartridge Fuel Filter Assembly
- Installation
- Under-cowl, inline
- Filtration Rating
- 20 micron
- Fuel Type
- Gasoline
- Housing Material
- Plastic with translucent bowl
- Housing Color
- Clear/Translucent bowl
- Dimensions
- 10 × 8 × 4 cm (3.9 × 3.1 × 1.6 inches)
- Weight
- 0.4 kg (0.88 lbs)
- Fitting Type
- Screw-on filter bowl
- Other Technical Attributes
- Features a translucent bowl for visual inspection of fuel content and debris
What’s in the Box
- 1 x Cartridge Type Fuel Filter Assembly (35-879884T/879884T)
Installation Notes
- Ensure the engine is off, cool, and the battery is disconnected.
- Relieve fuel system pressure according to your engine's service manual to prevent spills.
- Place an absorbent rag under the filter to catch any residual fuel.
- Unscrew the old filter bowl and remove the old cartridge. Note the orientation of any O-rings or seals.
- Clean the filter housing bowl before inserting the new filter cartridge.
- Lightly lubricate the new seals with clean engine oil and install them correctly.
- Screw the bowl assembly back on, tightening it to the manufacturer's specified torque. Do not overtighten.
- Reconnect the battery.
- Prime the fuel system as per your engine manual.
- Start the engine and carefully inspect the filter for any leaks.
Troubleshooting & FAQ
How do I know if this filter fits my specific engine model?
This filter is for Mercury/Mariner 30-60 HP 4-stroke EFI outboards. The most reliable way to confirm fitment is to match the part number (35-879884T or 879884T) with your existing filter or service manual. Also, verify that your engine has a screw-on filter bowl located under the cowl.
What is the advantage of the translucent bowl?
The clear, translucent bowl allows you to visually inspect for water, rust, dirt, and other contaminants in your fuel at a glance. This helps in early diagnosis of fuel quality issues before they can damage your engine.
How often should this fuel filter be replaced?
For optimal engine performance and protection, it is recommended to replace your fuel filter annually or every 100 hours of operation, whichever comes first. Refer to your engine's service manual for the precise maintenance interval.
What are symptoms of a clogged or failing fuel filter?
Common signs include engine bogging down at high speeds, difficulty starting, rough idling, stalling, or a noticeable loss of power. If you see significant debris or water in the filter bowl, it is time for a replacement.
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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