Mercury 866340K01 Mercruiser Oil Filter

Mercury 35-866340K01 Mercruiser Oil Filter

Protect your engine with the Mercury-Mercruiser 35-866340K01 oil filter: an OEM-grade component. Its advanced filtration captures particles as small as 1/1000th of an inch, keeping oil clean and flowing freely. Designed to match Mercury-Mercruiser specs, it maintains proper oil pressure while reducing wear on critical engine parts. Ideal for routine maintenance, this high-efficiency filter helps extend engine life and supports smoother operation in marine conditions. Whether you're prepping for the season or doing regular upkeep, it’s a must-have for anyone serious about preserving their engine's health.

Application:

• Fits all MCM/MIE GM engines, except V-6 models that have the oil filter mounted on the engine block
• Mercruiser In-Line 4- & 6- Cylinder Engines
• Mercruiser GM V8 Engines
• Mercruiser V6 & V8 Engines w/ Remote Oil Filter
• Fits 4.5L and 6.2L Mercury engine

Interchangeable Sierra:

• 18-7824-2
• 18-7876-1

Mercury Oil Filter Installation Instructions

1. Unscrew old filter and clean mounting base. Be sure old gasket is removed from mounting base
2. Apply a thin coat of oil to filter gasket. Make sure the gasket is seated properly in base of the filter
3. Screw on until the gasket contacts the base. Tighten 1 - 1-1/4 turn
4. Use an acceptable filter wrench if necessary. Do NOT exceed 1 - 1-1/4 turn
5. Refill crank case and run the engine while checking for leaks
6. Check oil level

Frequently Asked Questions

What is the Mercury 35-866340K01 MerCruiser Oil Filter used for?

The Mercury 35-866340K01 MerCruiser Oil Filter is an OEM-grade oil filter designed to keep engine oil clean while maintaining proper oil flow and oil pressure. Its filtration captures particles as small as 1/1000th of an inch. It is designed for routine maintenance on compatible Mercury-MerCruiser marine engines.

What MerCruiser engines does the Mercury 35-866340K01 oil filter fit?

The Mercury 35-866340K01 oil filter fits all MCM/MIE GM engines except V-6 models with the oil filter mounted directly on the engine block. It is also specified for MerCruiser inline 4- and 6-cylinder engines, GM V8 engines, V6 and V8 engines with a remote oil filter, and Mercury 4.5L and 6.2L engines.

How fine is the filtration of the Mercury 35-866340K01 oil filter?

The Mercury 35-866340K01 oil filter captures particles as small as 1/1000th of an inch. The filter is designed to maintain clean oil and free oil flow while supporting proper oil pressure and reducing wear on critical engine components.

How do you install the Mercury 35-866340K01 MerCruiser Oil Filter?

Remove the old filter, clean the mounting base, and make sure the old gasket is removed. Apply a thin coat of oil to the new gasket and seat it properly. Screw the filter on until the gasket contacts the base, then tighten 1 to 1-1/4 turns. Refill the crankcase, run the engine, check for leaks, and verify the oil level.

How tight should the Mercury 35-866340K01 oil filter be installed?

After the filter gasket contacts the mounting base, tighten the Mercury 35-866340K01 oil filter 1 to 1-1/4 turns. An acceptable filter wrench may be used if necessary, but do not exceed 1-1/4 turns. After installation, refill the crankcase and check for leaks while the engine is running.

What Sierra oil filters are interchangeable with the Mercury 35-866340K01?

The Mercury 35-866340K01 oil filter is listed as interchangeable with Sierra 18-7824-2 and Sierra 18-7876-1. Verify the engine application and existing filter part number before selecting an interchangeable filter to confirm compatibility with your Mercury-MerCruiser engine.

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