In-line fuel filter – code: 35-879885Q – Mercury

Mercury in-line fuel filter – code 35-879885Q

The Mercury in-line fuel filter (code 35-879885Q) is a component designed for installation under the cowl of the outboard motor, inline on the fuel circuit. It is designed to help keep the fuel cleaner, helping to trap contaminants and impurities that can accumulate over time in the tank or lines.

The structure with translucent body allows visual inspection of the contents and any debris, making it easier to check during regular maintenance activities. It is a solution suitable for those who want to keep the fuel system efficient and replace a contaminated filter with a replacement consistent with the manufacturer's specifications.

Features and details

Filtration and protection of the circuit

This filter is intended for the removal of contaminants carried by the fuel. The declared filtration is 20 micron, useful for intercepting particles that could reach sensitive components of the fuel system.

Under-cowl installation

The filter is intended for mounting under-cowl, thus in a protected position under the outboard cowl. This configuration is typical of inline filters dedicated to the engine circuit and facilitates integration with the existing system.

Translucent body for quick inspection

The translucent plastic body allows observation of the fuel and visual identification of any impurities or residues. This feature is practical during periodic checks, especially when contaminated fuel or debris presence is suspected.

Replacement using existing clamps

The replacement is designed to be performed using the clamps/tubes already present, without the need for additional hardware (depending on the system configuration). In the nautical field, this helps reduce intervention times during routine maintenance.

Replacement compliant with Mercury Marine specifications

The product is indicated as made to comply with the manufacturer's specifications (OEM Mercury Marine), with the aim of providing adequate engine protection and proper integration into the intended fuel system.

In summary

• Inline fuel filter for installation under the cowling
• Filtration grade: 20 micron
• Translucent body for visual inspection of fuel and debris
• Replacement with existing clamps (no additional hardware, original equipment)
• Mercury Code: 35-879885Q

Applications (fitment)

This filter is indicated as compatible with various outboards Mercury and Mariner. Below are the applications listed in the original description; before purchasing, it is advisable to verify compatibility with your engine (model/year/serial) or compare the replacement code.

• Outboard 30/40hp EFI FourStroke
• Outboard 4 cylinders (996 cc) 40/50/60hp EFI FourStroke
• 75–115hp FourStroke (1.7L, serial No. 1B366823–2B094995)
• 75–115hp FourStroke (2.1L, serial No. 2B094996 and above)
• 150hp EFI FourStroke (serial No. 1B905505 and above)
• 135–400hp Verado

Note: the above list is provided for informational purposes. In case of doubt, refer to the parts manual or the original code installed on the engine.

Benefits for maintenance and reliability

A fuel filter in good condition is an important element in outboard maintenance because it helps keep the fuel system cleaner. This model, thanks to its in-line configuration and translucent body, is particularly suitable for periodic inspections and scheduled replacements.

• Immediate visual check: the transparency of the body helps identify contaminants or residues without complex disassembly.
• Integration into the original layout: designed for under-cowl mounting and for use with the existing system.
• Targeted replacement: clear identification through code 35-879885Q, useful to avoid ordering errors.
• More straightforward maintenance: replacement designed to be performed with clamps already present (depending on the configuration).

Usage and operational notes

When to consider replacement

Filter replacement is recommended as part of regular maintenance and whenever signs of contaminated fuel or debris presence are detected. Periodic inspection of the translucent body can help determine when to intervene.

Installation instructions

The filter is intended to be mounted online on the fuel circuit, under the cowl. For a correct and safe intervention, follow the procedures provided by the engine manufacturer and check the mounting direction specified by the system. If unsure about the procedure, it is advisable to consult a qualified technician.

Check compatibility

To avoid incompatibilities, always check:

• Spare part code (35-879885Q) compared to the one required by the engine
• Model and serial number of the outboard, when indicated
• Any differences in under-cowl system configuration

Product data

• Supplier product code: MC35-879885Q
• Category: Engine parts and oils
• Tags: gasoline, filter

FAQ – Frequently Asked Questions

Where is this Mercury in-line fuel filter installed?

It is intended for installation under the outboard's under-cowl, in line on the fuel supply circuit.

What is the filtration rating of the 35-879885Q filter?

The product description reports a filtration of 20 microns.

What is the purpose of the translucent body?

It allows visual inspection of the fuel and detection of any debris or contaminants during periodic checks.

Is it compatible with Mercury and Mariner engines?

Yes, it is indicated as compatible with various Mercury and Mariner outboards. It is recommended to always check the model and serial number (when provided) or compare the original spare part code.

Is additional hardware needed for replacement?

The description indicates it can be replaced using existing clamps, without additional hardware, depending on the system configuration.