Description

The Mercury MerCruiser Quicksilver Oil Filter 877761K01 is a genuine Mercury screw-on 4-stroke engine oil filter for select Mercury 75–115 HP FourStroke outboards, 150 HP EFI FourStroke outboards, and 105 HP EFI Jet applications. It is designed to provide proper oil filtration and flow protection during routine engine service, helping remove contaminants from the oil and support long-term engine reliability.

Key Features

• Genuine Mercury / Quicksilver oil filter
• Part number: 877761K01
• Also referenced as 35-877761K01
• Screw-on canister-style 4-stroke engine oil filter
• Superior M-pleated cleansing filter media helps remove oil contaminants
• Easy replacement with common tools and an oil filter wrench
• Built to Mercury Marine fit, function, and performance standards for compatible outboard applications

Engine Compatibility

Designed for select Mercury FourStroke outboards, including:

• 75–115 HP FourStroke outboards — serial number 1B366823 through 2B094995
• 150 HP EFI FourStroke outboard
• 105 HP EFI Jet

Serial Number Fitment Notice

Oil filter fitment can vary by horsepower, engine family, production year, and serial number range. Always confirm 877761K01 / 35-877761K01 against your engine serial number, original filter, owner’s manual, or Mercury parts diagram before ordering.

When This Part Needs Replacement

Replace the oil filter during scheduled oil changes, seasonal service, winterization, or any time the filter is damaged, leaking, corroded, or overdue for maintenance. A clean oil filter helps keep abrasive contaminants out of the lubrication system and supports reliable long-term engine operation.

Installation Notes

Lightly oil the new filter gasket before installation, spin the filter on until the gasket contacts the sealing surface, then tighten according to the engine service manual. After installation, run the engine, check carefully for leaks, shut down, and recheck the oil level before returning the outboard to service.

Alternate/Superseded Part Numbers

• Mercury: 877761K01
• Mercury / Quicksilver reference: 35-877761K01
• Related Quicksilver reference: 877761Q01
• Thread reference commonly listed for this filter family: M22 x 1.5

Parts Desk Insight

This filter is best matched by serial number, not horsepower alone. It is tied to the earlier 75–115 HP FourStroke serial range and the 150 HP EFI FourStroke platform, so confirming the original filter or Mercury parts diagram is the safest way to avoid a mismatch.

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