MerCruiser Oil Filter (866340K01) – Mercury

Mercury MerCruiser Oil Filter 866340K01

Essential Engine Protection

The Mercury MerCruiser Oil Filter 866340K01 helps keep your marine engine running smoothly by removing harmful contaminants from the oil. It uses high‑efficiency M‑Pleated media to trap debris that can cause wear and tear inside your engine. Because clean oil is vital for lubrication and performance, changing the filter regularly helps maintain engine health and optimise power delivery.

Designed for Marine Conditions

Importantly, this filter is engineered specifically for sterndrive and inboard engines used in boating. It fits a range of Mercury Marine and GM‑based engines, including 4.5L and 6.2L sterndrive and inboards, except models with the oil filter mounted on the engine block. Therefore, you can trust it to withstand the unique challenges of saltwater and freshwater operation.

Efficient Filtration and Easy Replacement

This spin‑on oil filter makes routine maintenance straightforward. Its robust design and standard sizing let you install or replace it quickly with common tools like an oil‑filter wrench. Moreover, because it seals securely and resists leaks, you maintain consistent oil flow and engine protection after each change.

Keeps Your Engine Healthy

In addition to trapping contaminants, this filter helps reduce friction and engine stresses caused by dirty oil. Consequently, your engine runs more smoothly, with fewer performance drops and less internal wear over time. Regular replacement also supports longer engine life and fewer unexpected servicing issues.

Practical and Reliable

Finally, because this is a genuine Mercury‑designed filter, it matches factory specifications for fit, form, and function. Therefore, it’s a dependable choice for boat owners seeking proven protection and ease of maintenance for their MerCruiser engines.

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