Cartridge Fuel Filter – Fits Mercury/Mariner Outboard 30-60 HP 3/4 Cylinder EFI (Replaces 35-879884T)
Cartridge Fuel Filter – Fits Mercury/Mariner Outboard 30-60 HP 3/4 Cylinder EFI (Replaces 35-879884T) 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
Cartridge Fuel Filter – Fits Mercury/Mariner Outboard 30-60 HP 3/4 ...
Product Details
This Cartridge Fuel Filter – Fits Mercury/Mariner Outboard 30-60 HP 3/4 Cylinder EFI (Replaces 35-879884T) is an essential component designed for comprehensive fuel system protection. It is specifically engineered for Mercury and Mariner 30-60 HP 4-Stroke EFI outboards, covering both 3-cylinder and 4-cylinder models for reliable performance.
It serves as a direct replacement for Mercury/Mariner part numbers 35-879884T and 879884T.
- Features a translucent bowl to visually inspect fuel content and trapped debris.
- Installs inline under the cowl for seamless integration.
- Provides 20-micron filtration to protect sensitive fuel injection components.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Mercury/Mariner | 35-879884T |
| Mercury/Mariner | 879884T |
Engine & Model Compatibility
Confirm your engine model in the table below to ensure accurate fitment.
For Mercury & Mariner Engines: This filter assembly is designed for the 30, 40, 50, and 60 HP four-stroke EFI outboard models. Please verify your specific model and OEM part number against the list.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | 30 EFI | 30 | 4-Stroke | 35-879884T | 3-cylinder |
| Mercury | 40 EFI | 40 | 4-Stroke | 35-879884T | 3-cylinder and 4-cylinder models |
| Mercury | 50 EFI | 50 | 4-Stroke | 35-879884T | 4-cylinder |
| Mercury | 60 EFI | 60 | 4-Stroke | 35-879884T | 4-cylinder |
| Mercury | Formula 60 | 60 | 4-Stroke | 35-879884T | 4-cylinder |
| Mariner | 30 EFI | 30 | 4-Stroke | 35-879884T | 3-cylinder |
| Mariner | 40 EFI | 40 | 4-Stroke | 35-879884T | 3-cylinder and 4-cylinder models |
| Mariner | 50 EFI | 50 | 4-Stroke | 35-879884T | 4-cylinder |
| Mariner | 60 EFI | 60 | 4-Stroke | 35-879884T | 4-cylinder |
Technical Specs
- Product Type
- Cartridge Fuel Filter Assembly
- Installation
- Under-cowl, inline
- Filtration Rating
- 20 micron
- Fuel Type
- Gasoline
- Connection
- Screw-on type filter bowl
- Housing Material
- Plastic with translucent bowl
- Weight
- 68g (2.4 oz)
What’s in the Box
- 1 x Cartridge Fuel Filter Assembly (35-879884T)
Installation Notes
- Shut off the engine and allow it to cool completely before starting.
- Turn off the fuel supply valve and place a suitable container or drip pan under the work area to catch any spilled fuel.
- Relieve pressure from the fuel line according to the manufacturer's service manual.
- Note the direction of fuel flow, often marked with an arrow on the original filter housing.
- Carefully disconnect the fuel lines from the old filter. Be prepared for minor fuel spillage.
- Remove the old filter assembly from its mounting bracket.
- Install the new filter, making sure the direction of fuel flow is correct.
- Securely reconnect the fuel lines to the new filter.
- Turn the fuel supply on and prime the system as required.
- Thoroughly check all connections for leaks before attempting to start the engine.
- Start the engine and check again for any signs of fuel leakage.
Troubleshooting & FAQ
How can I confirm this filter fits my specific outboard model?
This filter is designed for Mercury and Mariner 30-60 HP 4-stroke EFI outboards. The most reliable way to confirm fitment is to check that your original part number is 35-879884T or 879884T. You can also review the detailed compatibility table on this page.
What are the signs of a clogged or failing fuel filter?
Common symptoms of a bad fuel filter include difficulty starting the engine, rough idling, stalling at low speeds, reduced engine power, and poor acceleration. The translucent bowl on this filter also allows you to visually inspect for water or debris accumulation.
How often should this fuel filter be replaced?
As a general maintenance guideline, you should replace your fuel filter annually or every 100 hours of engine operation, whichever comes first. However, always consult your engine’s service manual for the manufacturer-recommended maintenance schedule.
Can I clean and reuse this filter?
No. This is a disposable cartridge-style filter. It is designed to be replaced, not cleaned. Attempting to clean it can damage the filter media and will not restore its original filtration efficiency, potentially harming your engine.
What is the difference between OEM and aftermarket parts?
This listing is for an aftermarket replacement part, not an original equipment manufacturer (OEM) component. It is built to meet or exceed OEM-level specifications using comparable materials and is manufactured in an ISO 9001 certified facility. Each batch is inspected for quality and consistency.
What are your shipping speeds and costs?
We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free for all orders. Expedited shipping options may be available at checkout, depending on your location.
What is your warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard return window for items that are unused and in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Always verify images and specifications against your original part before purchasing. If anything differs—even if your model appears on a compatibility list—do not order.
- This is a high-quality aftermarket replacement component, not an OEM part. Brand names and part numbers are used for reference purposes only.
- Professional installation is strongly recommended for safety and to ensure proper performance. Improper installation can lead to fuel leaks and create a fire hazard.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world performance and durability.
- Fast Global Fulfillment — We offer free standard delivery to most regions with an average transit time of 5–15 days.
- Manufacturer-Direct Value — By working directly with our manufacturing partners, we provide fair pricing without compromising on materials or quality control.
Payment & Security
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