Inline Fuel Filter Assembly for Mercury/Mariner 30–60 HP 4-Stroke Outboards – Replaces 35-879884T and 879884T
Inline Fuel Filter Assembly for Mercury/Mariner 30–60 HP 4-Stroke Outboards – Replaces 35-879884T and 879884T is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Inline Fuel Filter Assembly for Mercury/Mariner 30–60 HP 4-Stroke O...
Inline Fuel Filter Assembly for Mercury/Mariner 30–60 HP 4-Stroke Outboards – Replaces 35-879884T and 879884T is backordered and will ship as soon as it is back in stock.
Product Details
This inline fuel filter assembly is designed for selected Mercury and Mariner 4-stroke EFI outboard applications. Installed under the engine cowl, it helps remove contaminants from the gasoline supply before fuel reaches the engine. The translucent bowl allows visual inspection for sediment or other visible contamination.
Use the part-number references and the engine application information below to check compatibility before ordering. Model, horsepower, stroke, year, and serial-number conditions must all match your engine.
- Inline installation under the engine cowl.
- 20-micron filter element as listed for this application.
- Translucent bowl for visual inspection of fuel condition.
- Replacement assembly for selected Mercury and Mariner outboards.
Part Number Matrix
The following numbers are cross-reference identifiers associated with this filter application. They are not a guarantee of fit by themselves; confirm the complete engine application and serial range.
| Brand | Part Number | Reference |
|---|---|---|
| Mercury Marine | 35-879884T | Replacement reference |
| Mercury Marine | 879884T | Replacement reference |
| Quicksilver | 879884T | Replacement reference |
| Sierra | 18-79965 | Aftermarket cross-reference; verify application before purchase |
Engine & Model Compatibility
The application information below covers selected Mercury and Mariner 4-stroke outboards. Serial-number ranges are included because the same horsepower rating may use different parts across model years and production ranges. The entries are application references, not a substitute for checking the identification label and the original filter.
| Brand | Model / Application | Rated HP | Stroke | Year and Serial Range | Reference Part No. |
|---|---|---|---|---|---|
| Mercury | Outboard | 30 HP | 4-Stroke | 2014 and up; 1C456300 and up | 879884T |
| Mercury | Outboard EFI | 30 HP | 4-Stroke | 2000–2014; 0T409000 through 1B226999 | 879884T |
| Mercury | Outboard EFI | 30 HP | 4-Stroke | 2000–2014; 0P153500 through 0P400999 | 879884T |
| Mercury | Outboard EFI | 30 HP | 4-Stroke | 2000–2014; 1C109093 through 1C456299 | 879884T |
| Mercury | Outboard EFI JET | 35 HP | 4-Stroke | 2014 and up; 1C453840 and up | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 0T409000 through 1B226999 | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 1B227000 through 1B355027 | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 0P153500 through 0P400999 | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 0P401000 through 0P515896 | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 0P515897 through 0P580772 | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 0P515897 through 1C453839 | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 1C000001 through 1C043416 | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 1C000001 through 1C049738 | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 1C000001 through 1C050251 | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 1C043417 through 1C456299 | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 1C049739 and up | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2000–2014; 1C050252 through 1C453839 | 879884T |
| Mercury | Outboard EFI | 40 HP | 4-Stroke | 2014 and up; 1C456300 and up | 879884T |
| Mercury | Outboard EFI JET | 40 HP | 4-Stroke | 2000–2014; 1C051324 through 1C453839 | 879884T |
| Mercury | Outboard EFI Sea Pro | 40 HP | 4-Stroke | 2014 and up; 1C453840 and up | 879884T |
| Mercury | Outboard EFI | 50 HP | 4-Stroke | 2000–2014; 0T409000 through 1B355222 | 879884T |
| Mercury | Outboard EFI | 50 HP | 4-Stroke | 2000–2014; 0P153500 through 0P400999 | 879884T |
| Mercury | Outboard EFI | 50 HP | 4-Stroke | 2000–2014; 0P401000 through 0P515896 | 879884T |
| Mercury | Outboard EFI | 50 HP | 4-Stroke | 2000–2014; 0P515897 through 0P580772 | 879884T |
| Mercury | Outboard EFI | 50 HP | 4-Stroke | 2000–2014; 1C000001 through 1C050251 | 879884T |
| Mercury | Outboard EFI | 50 HP | 4-Stroke | 2000–2014; 1C050252 through 1C453839 | 879884T |
| Mercury | Outboard EFI | 50 HP | 4-Stroke | 2014 and up; 1C453840 and up | 879884T |
| Mariner | Outboard | 50 HP | 4-Stroke | 2010; 7E51413VZ | 879884T |
| Mercury | Outboard EFI | 60 HP | 4-Stroke | 2000–2014; 0T409000 through 1B355222 | 879884T |
| Mercury | Outboard EFI | 60 HP | 4-Stroke | 2000–2014; 0P153500 through 0P400999 | 879884T |
| Mercury | Outboard EFI | 60 HP | 4-Stroke | 2000–2014; 0P401000 through 0P515896 | 879884T |
| Mercury | Outboard EFI | 60 HP | 4-Stroke | 2000–2014; 0P515897 through 0P580772 | 879884T |
| Mercury | Outboard EFI | 60 HP | 4-Stroke | 2000–2014; 1C000001 through 1C050251 | 879884T |
| Mercury | Outboard EFI | 60 HP | 4-Stroke | 2000–2014; 1C050252 through 1C453839 | 879884T |
| Mercury | Outboard EFI | 60 HP | 4-Stroke | 2014 and up; 1C453840 and up | 879884T |
| Mariner | Outboard | 60 HP | 4-Stroke | 2007; 7E60452IZ | 879884T |
| Mariner | Outboard | 60 HP | 4-Stroke | 2010; 7E60413VZ | 879884T |
| Mercury | Outboard Formula | 60 HP | 4-Stroke | 2014 and up; 1C104574 and up | 879884T |
| Mercury | Outboard Racing | 60R | 4-Stroke | 2014 and up; 1C615064 and up | 879884T |
| Mercury | Outboard Sea Pro | 60 HP | 4-Stroke | 2014 and up; 1C453840 and up | 879884T |
Technical Specifications
- Product Type
- Inline cartridge fuel filter assembly
- Installation
- Under-cowl, inline
- Filtration Rating
- 20 micron, as listed for this application
- Fuel Type
- Gasoline
- Connection
- Inline fuel-line connection
- Housing
- Plastic housing with translucent bowl
- Visual Inspection
- The translucent bowl allows visible inspection of fuel condition and contamination.
- Product Configuration
- Single replacement filter assembly; not a fuel-pump assembly and not a multi-piece kit.
What's in the Box
- 1 × inline cartridge fuel filter assembly
Fuel lines, clamps, mounting hardware, and tools are not included unless specifically supplied with the original application.
Installation Notes
- Turn the engine off, allow it to cool, and disconnect the battery where appropriate.
- Work outdoors or in a well-ventilated area away from flame, sparks, and ignition sources. Keep an appropriate fire extinguisher nearby.
- Place an absorbent rag or suitable container below the filter to catch spilled fuel.
- Locate the existing filter assembly under the engine cowl and note the fuel-flow direction.
- Disconnect the fuel lines carefully and cap or protect the lines as necessary to limit fuel spillage.
- Remove the old assembly from its bracket or retaining position, if applicable.
- Install the replacement with the flow direction matching the original installation or the arrow on the filter.
- Reconnect and secure both fuel lines. Use suitable clamps where required by the engine manufacturer.
- If the assembly has a threaded or screw-on bowl, tighten it by hand and do not overtighten.
- Prime the fuel system according to the engine service manual.
- Inspect every connection for leaks before starting the engine.
- Reconnect the battery if disconnected, start the engine, and check again for leaks while it idles.
Troubleshooting & FAQ
How do I confirm that this filter fits my engine?
Compare the original filter's part number with the Part Number Matrix, then match the engine brand, model or application, horsepower, 4-stroke configuration, year, and serial-number range in the compatibility table. If any condition differs, verify the application with the engine service information before ordering.
What are common signs of a restricted fuel filter?
Possible symptoms include hard starting, stalling, rough idle, hesitation, misfiring, or loss of power under acceleration. Visible sediment or water in the bowl can also indicate fuel contamination. These symptoms may have other causes, so diagnose the complete fuel system.
How often should the filter be replaced?
Replacement timing depends on fuel quality, storage conditions, and engine use. Inspect the bowl periodically and replace the assembly if contamination is visible, fuel flow is restricted, or the engine manufacturer's maintenance schedule calls for replacement.
Can the filter element be cleaned?
This listing is for a replacement cartridge-style assembly. Do not attempt to restore the filter element by washing or blowing it out unless the engine manufacturer specifically provides a service procedure for that filter.
Why are there several entries for the same horsepower rating?
Mercury and Mariner engines with the same rated horsepower can use different components depending on model type, EFI or JET configuration, production year, and serial-number range. Match the complete application rather than relying on horsepower alone.
Is this an OEM part?
This listing is for an aftermarket replacement assembly. Mercury, Mariner, Quicksilver, and Sierra names and part numbers are used only to identify the referenced applications and replacement relationships.
What warranty and return coverage applies?
Warranty, shipping, and return terms are determined by the seller's current store policies. Check the applicable policy information for the order before installation, and retain the packaging until fit and operation have been confirmed.
Safety & Important Information
- Fuel is flammable. Work in a well-ventilated area and keep the product away from heat, flame, sparks, and smoking materials.
- Relieve or contain fuel pressure as required by the engine service procedure before disconnecting fuel lines.
- Verify the original part, fuel-line connections, flow direction, and complete engine application before installation.
- Do not operate the engine if fuel leaks are present. Professional installation is recommended when the correct service procedure is uncertain.
- This is an aftermarket replacement filter assembly, not a fuel-pump assembly.
About Sea Sierra
- Marine replacement parts selected for practical service and repair applications.
- Product information is organized around part-number references and engine application details.
- Confirm fitment and review current store policies before purchase and installation.
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