Description

The Mercury MerCruiser Quicksilver Oil Filter 866340K01 is a genuine Mercury 4-stroke engine oil filter for select MerCruiser sterndrive and inboard engines. It is designed to provide efficient oil filtration, helping remove contaminants from the engine oil while maintaining proper oil flow and protection during routine marine engine service.

Key Features

• Genuine Mercury Marine oil filter
• Part number: 866340K01
• Also referenced as 35-866340K01
• Screw-on canister-style oil filter
• Superior M-Pleated cleansing filter media helps remove oil contaminants
• Easy replacement with common tools and an oil filter wrench
• Designed for marine sterndrive and inboard engine applications
• UPC: 745061696495

Engine Compatibility

Designed for use on MerCruiser 4.5L and 6.2L sterndrive and inboard engines, plus many GM-based MerCruiser sterndrive and inboard gasoline engines. Mercury notes this filter is not for V6 models with the oil filter mounted directly on the engine block.

Commonly referenced applications include many MCM / MIE GM gasoline engine setups, depending on exact model and serial range.

Serial Number Fitment Notice

Oil filter fitment can vary by engine model, oil filter mounting location, production year, and serial number. Always confirm 866340K01 / 35-866340K01 against your MerCruiser engine serial number, original filter, or Mercury parts diagram before ordering.

When This Part Needs Replacement

Replace the oil filter during scheduled oil changes, seasonal maintenance, winterization, or any time the filter is damaged, corroded, leaking, restricted, or overdue for service. A clean oil filter helps protect internal engine components from abrasive contaminants and supports long-term engine life.

Installation Notes

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

Alternate/Superseded Part Numbers

• Mercury: 866340K01
• Mercury / Quicksilver reference: 35-866340K01
• Related Quicksilver reference: 35-866340Q03
• UPC: 745061696495

Parts Desk Insight

This filter is best matched by engine serial number and filter mounting location, not just engine size. The V6 exception matters because some MerCruiser V6 engines use a different filter when the oil filter mounts directly on the engine block.

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