Mercury Quicksilver Oil Filter 877761K01 – 75–150 HP FourStroke Outboard

Mercury Quicksilver Oil Filter 877761K01 – FourStroke Outboard

Keep your Mercury FourStroke outboard’s lubrication system clean and protected with this genuine Quicksilver screw-on oil filter. Designed for select 75–150 HP FourStroke and 105 HP EFI Jet outboards, this filter removes contaminants from the oil circuit to protect bearings, pistons, and internal engine components during every hour of operation. Replace at every oil change for reliable, long-term engine performance.

Compatible Applications

• Mercury FourStroke outboards 75–115 HP — serial number range 1B366823 through 2B094995
• Mercury 150 HP EFI FourStroke outboard
• Mercury 105 HP EFI Jet outboard
• Confirm fitment against your engine serial number and Mercury parts diagram before ordering — filter fitment varies by production year and serial range

Part Details

• OEM Part Number: 877761K01
• Mercury / Quicksilver Reference: 35-877761K01
• Related Reference: 877761Q01
• Brand: Mercury / Quicksilver
• Type: Screw-on canister oil filter
• Thread Size: M22 x 1.5
• Filter Media: M-pleated cleansing filter media
• System: Engine lubrication / oil circuit
• Condition: New OEM

Service Interval

Replace at every scheduled oil change — typically every 100 hours or annually, whichever comes first. Also replace during winterization, seasonal service, or any time the filter is leaking, corroded, or damaged.

Technical FAQ

• How do I install this filter? Lightly oil the gasket with fresh engine oil before installation. Spin on until the gasket contacts the sealing surface, then tighten by hand plus 3/4 turn, or per the service manual specification. Do not overtighten.
• How do I remove the old filter? Use an oil filter wrench for removal. The Mercury Quicksilver Oil Filter Wrench 802653K02 is the correct tool for this application.
• What oil should I use with this filter? Use the viscosity specified in your engine owner’s manual. Most 75–150 HP FourStroke outboards specify SAE 25W-40 marine engine oil. See Mercury 4-Stroke Engine Oil 1L 8M0078639 or Mercury 4-Stroke Oil 4L 8M0078640.
• Is there a complete oil change kit available? Yes — see the Mercury Quicksilver Oil Change Kit 8M0081917 or 8M0081914, which include the filter and oil together.
• Does this filter fit all Mercury FourStroke outboards? No — Mercury uses multiple filter part numbers across its FourStroke lineup. Fitment is serial-number-specific. If your engine is outside the 1B366823–2B094995 range or is a different HP, check the 8M0123025, 877769K01, 8M0162830, or 8M0154775.

Related Parts

• Mercury Quicksilver Oil Filter Wrench – 802653K02
• Mercury Quicksilver Oil Change Kit – 8M0081917
• Mercury Quicksilver Oil Change Kit – 8M0081914
• Mercury 4-Stroke Engine Oil 1L – 8M0078639
• Mercury 4-Stroke Oil 4L – 8M0078640
• Mercury Quicksilver 100 Hour Service Kit – 8M0094232
• Mercury Quicksilver 100 Hour Service Kit – 8M0097854
• Mercury Quicksilver Oil Filter – 8M0123025 (alternate fitment)
• Mercury Quicksilver Oil Filter – 877769K01 (alternate fitment)

Parts Desk Insights

The 877761K01 is a serial-number-specific filter — the most common mistake is ordering by horsepower alone. Mercury uses different filter part numbers across the same HP range depending on production year and engine family, so always cross-reference the serial number against the Mercury parts diagram or your original filter before ordering. If you’re doing a full oil service, the oil change kits bundle the filter and oil together and are often better value than buying separately. After installation, always run the engine, check for leaks at the filter gasket, shut down, and recheck the oil level before returning to service — a dry-start or overfilled crankcase after a filter change is a common and avoidable mistake.