Description

The Mercury MerCruiser Quicksilver Oil Filter 8M0123025 is a genuine Mercury replacement oil filter designed for select Mercury 3.4L V6 and 4.6L V8 FourStroke outboards. It provides efficient engine oil filtration, helping remove contaminants from the oil while supporting proper lubrication and long-term engine protection during routine service.

Key Features

• Genuine Mercury Marine replacement oil filter
• Part number: 8M0123025
• Also referenced as 35-8M0123025
• Fits select Mercury V6 and V8 FourStroke outboards
• Anti-drainback valve helps maintain startup lubrication and reduce dry starts
• Superior M-pleated filter media helps remove oil contaminants
• Spin-on design allows replacement with common tools and an oil filter wrench

Engine Compatibility

Fits select Mercury FourStroke outboards, including:

• 3.4L V6 FourStroke — 175–300 HP
• 4.6L V8 FourStroke — 175–300 HP applications
• Also commonly associated with select 450R 4.6L V8 Racing / Verado applications when matched by serial number and parts diagram

Serial Number Fitment Notice

Oil filter fitment can vary by horsepower, engine family, model year, and serial number range. Always confirm 8M0123025 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 protect internal engine components from abrasive contaminants and supports reliable 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, inspect for leaks, shut down, and recheck the oil level before returning the engine to service.

Alternate/Superseded Part Numbers

• Mercury: 8M0123025
• Mercury reference: 35-8M0123025
• Quicksilver related reference: 35-8M0176312 / 8M0176312
• Related prior references: 877767K01, 877767Q01
• Sierra aftermarket equivalent: 18-8703

Parts Desk Insight

This filter is tied to newer Mercury V6 and V8 FourStroke outboard platforms, so the safest match is by serial number and original filter number, not horsepower alone. The 3.4L V6, 4.6L V8, and Racing / Verado applications can look similar across model families, but the parts diagram should always be the final check.

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