Description

Mercury 879885Q is a genuine Quicksilver under-cowl in-line fuel filter for selected Mercury and Mariner outboards. Mercury describes it as a replacement filter with a translucent plastic body that lets you visually check fuel condition and contaminants while helping protect the engine from fuel-borne debris.

Key Features

• Genuine Mercury Marine / Quicksilver OEM part
• Part number 879885Q
• Common catalog format: 35-879885Q
• Under-cowl in-line fuel filter
• Translucent body for quick visual inspection
• Mercury states it uses 20-micron filtration to remove damaging contaminants from fuel.

Engine Compatibility
This filter is commonly listed for selected Mercury and Mariner outboards including 30/40 HP EFI FourStroke, 4-cylinder 40/50/60 HP EFI FourStroke, 75–115 HP FourStroke, 150 EFI FourStroke, and 135–300 HP Verado applications, depending on serial range. Exact fitment should always be confirmed by engine model and serial number before ordering.

Serial Number Fitment Notice
Please confirm compatibility by your exact Mercury outboard serial number before purchase. Fuel filters can vary by engine family, fuel-system layout, and serial break, so matching the exact OEM part number is the safest approach.

When This Part Needs Replacement
Replace this filter when fuel contamination is visible, fuel flow is restricted, engine performance drops, or as part of routine maintenance. Mercury positions it as a service replacement filter that helps stop moisture and fuel contaminants from reaching the engine.

Installation Notes
This is an under-cowl inline filter and is designed to be replaced using the existing hose clamps with no additional hardware required on applicable engines. Install only on the exact applications that call for 879885Q / 35-879885Q.

Alternate / Superseded Part Numbers

• 35-879885Q
  No confirmed superseded Mercury part number was established from the sources reviewed.

Parts Desk Insight
A translucent in-line filter is helpful because you can often spot fuel contamination before it turns into a bigger running issue. On outboards that sit between trips, checking the filter during regular service is a simple way to catch trouble early. This is a practical service inference based on Mercury’s emphasis on visible inspection and contaminant control.

Shipping: Ships same or next day for fast Canada wide shipping.