Quicksilver Oil Filter for Mercury/Mariner 75–115hp and 150hp EFI — 877761Q01, anti‑drain valve & heavy‑duty shell

Quicksilver 877761Q01 is a direct-fit replacement oil filter engineered to protect select Mercury and Mariner 75–115hp outboards and the Mercury 150hp EFI 4-stroke outboard by trapping contaminants and preventing dry starts.

This genuine Quicksilver oil filter is built to the same specifications used for Mercury Marine original equipment, combining reinforced construction, advanced filter media, and an anti-drain back valve to maximize lubrication at startup. Designed to meet demanding marine conditions, it is a simple swap for routine maintenance and helps prolong engine life by removing particles, sludge, and other contaminants from engine oil.

Which engines and serial ranges does this filter fit?

This 877761Q01 filter fits select Mercury and Mariner outboards in the 75–115 horsepower range and the Mercury 150hp EFI 4-stroke. Compatibility includes specific serial number ranges, so always check your engine serial to confirm fitment before purchase.

• Fits Mercury/Mariner 75–115hp outboards (referenced serial range noted by manufacturer)
• Compatible with Mercury 150hp EFI 4-stroke outboards
• Direct-replacement for OEM Mercury applications to ensure correct fit and function

How does this filter protect the engine during startup and operation?

Quicksilver’s filter includes an anti-drain back valve that keeps oil in the engine when it’s turned off, preventing dry starts that can accelerate wear. Inside, M‑pleated filter media captures fine contaminants and resists clogging to maintain consistent oil flow under load.

• Anti-drain back valve preserves oil in the gallery for immediate lubrication at startup
• M‑pleated media removes small particles and reduces oil contamination
• Designed for steady oil flow to protect bearings and moving parts during operation

What makes Quicksilver’s construction different from ordinary filters?

This cartridge features a shell that is approximately 50% thicker than conventional filters and a corrosion-resistant finish suitable for the marine environment. The robust casing resists deformation during installation and under pressure, while meeting the original-equipment manufacturing standards set by Mercury Marine.

• 50% thicker metal shell for enhanced durability and pressure resistance
• Corrosion-resistant coating to withstand marine conditions
• Manufactured to OEM specifications for reliable, repeatable performance

Is the filter easy to replace and maintain?

Replacement is straightforward with common hand tools and an oil filter wrench, allowing routine maintenance to be completed quickly at home or on the dock. The design simplifies installation and removal, and using the correct Quicksilver part helps ensure sealing and fitment match the engine’s requirements.

• Removable with standard oil filter wrench or basic hand tools
• OEM-style dimensions and sealing surface for a reliable fit
• Regular replacement recommended per engine manufacturer service intervals

Who is this for: Boaters, technicians, and marine service shops who operate or maintain Mercury and Mariner outboard engines in the 75–115hp range and the 150hp EFI 4-stroke will value this Quicksilver 877761Q01 oil filter. It’s ideal for anyone seeking an original-equipment replacement that emphasizes startup protection, contaminant removal, and rugged construction to resist marine wear. Choose Quicksilver when you want a part designed to meet factory standards and simplify routine engine care.