Mercury 866340K01 4-Stroke Oil Filter for MerCruiser Sterndrive & Inboard Engines | MERCURY

Overview

The Mercury 866340K01 oil filter is engineered for MerCruiser sterndrive and inboard engines, delivering dependable filtration during routine maintenance. It covers popular configurations in the 4.5L and 6.2L families and GM builds, while Mercury’s long history of engineering and testing helps ensure a proper fit and trusted performance.

Why this filter matters

• Superior M-Pleated cleansing filter captures a majority of oil contaminants, helping keep oil cleaner during service life.
• Rugged filtration media and housing withstand typical marine operating conditions, supporting consistent filtration.
• Compact, service-friendly design simplifies replacement with common tools and an oil filter wrench.
• Mercury parts are backed by decades of experience in engineering, testing, and manufacturing for reliable fit and performance.

Easy installation and maintenance

• Designed for straightforward swapping during routine oil service, minimizing downtime.
• Replacement is possible with standard tools, reducing the need for specialized equipment.
• Helps maintain proper oil flow and filtration, contributing to engine cleanliness over time.

Compatibility at a glance

For use on all MerCruiser 4.5L and 6.2L sterndrive and inboard engines plus GM engines, except V6 models that have the oil filter mounted on the engine block.

Real-world use

During routine maintenance, technicians appreciate a swap that’s straightforward and predictable. This filter’s design supports common oil-change workflows on MerCruiser setups, while offering broad compatibility to simplify inventory decisions for shops and boat owners alike. The media and housing work together to support a clean oil path through everyday boating seasons.

Quality and peace of mind

Backed by Mercury’s engineering heritage, this filter is built to cooperate with Mercury parts and service practices. While outcomes depend on overall maintenance, selecting a proven filter helps align with established workflows and the goal of clean oil paths in typical marine engines.