Mercury 8M0123025 175-300HP V6/V8 4-Stroke Oil Filter

Mercury 35-8M0123025 Oil Filter for V6 & V8 FourStroke Outboards

The Mercury 35-8M0123025 Replacement Oil Filter is designed to provide efficient, effective oil filtration for compatible Mercury V6 and V8 FourStroke outboards. This genuine Mercury oil filter helps remove oil contaminants and supports clean oil flow through vital engine components.

Featuring superior M-pleated cleansing filter media, this oil filter is built to help protect Mercury 3.4L V6 and 4.6L V8 FourStroke outboards from damaging contaminants. The anti-drain back valve helps maintain start-up lubrication and helps reduce dry starts after the engine has been sitting.

Product Features:

• Genuine Mercury replacement oil filter
• Fits select Mercury 3.4L V6 and 4.6L V8 FourStroke outboards
• Designed for efficient, effective oil filtration
• Superior M-pleated cleansing filter media helps remove oil contaminants
• Anti-drain back valve helps ensure start-up lubrication
• Easy to replace with common tools and an oil filter wrench
• Interchangeable with Sierra 18-8703

Product Details:

• Brand: Mercury
• Manufacturer Part Number: 35-8M0123025
• Part Type: Outboard Oil Filter
• Application: Select Mercury V6 and V8 FourStroke outboards
• Interchange: Sierra 18-8703

Fits Select Mercury FourStroke Outboards:

• 150R and 200R 3.4L V6 FourStroke, serial number 3B547096 and above
• 175-300 HP 3.4L V6 and 4.6L V8 FourStroke, serial number 2B529482 and above
• 250R and 300R 4.6L V8 FourStroke, serial number 1E080500 and above
• 450R 4.6L V8 FourStroke, serial number 1E083006 through 1E099720

General Installation Steps:

• Unscrew the old oil filter and clean the mounting base.
• Make sure the old gasket is removed from the mounting base.
• Apply a thin coat of oil to the new filter gasket.
• Make sure the gasket is seated properly in the base of the filter.
• Screw the filter on until the gasket contacts the base.
• Tighten 1 to 1-1/4 turns. Do not exceed 1 to 1-1/4 turns.
• Use an acceptable filter wrench if necessary.
• Refill the crankcase, run the engine, and check for leaks.
• Check the oil level after running the engine.

Maintenance Note: Follow your Mercury owner’s manual for the recommended oil filter replacement interval, oil type, oil capacity, and service procedure for your specific outboard.

Fitment Note: Oil filter fitment should be verified by outboard model, horsepower, engine family, serial number, parts diagram, or existing filter part number before ordering. Please confirm this oil filter is correct for your Mercury V6 or V8 FourStroke outboard before purchasing.

Frequently Asked Questions

What is the Mercury 35-8M0123025 Oil Filter used for?

The Mercury 35-8M0123025 Replacement Oil Filter is designed for oil filtration in select Mercury V6 and V8 FourStroke outboards. Its M-pleated cleansing filter media helps remove oil contaminants, while the anti-drain back valve helps maintain start-up lubrication and reduce dry starts after the engine has been sitting.

Which Mercury FourStroke outboards does the 35-8M0123025 oil filter fit?

This oil filter fits select Mercury 3.4L V6 and 4.6L V8 FourStroke outboards, including specified 150R, 175-300 HP, 200R, 250R, 300R, and 450R applications. Fitment depends on the specific model, engine family, horsepower, and serial number, so verify your outboard against the listed application information before ordering.

What does the anti-drain back valve do in the Mercury 35-8M0123025 oil filter?

The anti-drain back valve helps maintain lubrication at engine start-up by helping keep oil from draining back after the engine has been sitting. This feature is designed to help reduce dry starts and support oil flow through vital engine components.

How do I install the Mercury 35-8M0123025 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, and check for leaks and oil level.

Is the Mercury 35-8M0123025 oil filter interchangeable with another filter?

Yes. The Mercury 35-8M0123025 oil filter is listed as interchangeable with Sierra 18-8703. You should still verify the replacement by outboard model, horsepower, engine family, serial number, parts diagram, or existing filter part number before ordering.

What should I verify before ordering the Mercury 35-8M0123025 oil filter?

Verify that your Mercury outboard is one of the specified V6 or V8 FourStroke applications and that its serial number falls within the listed range. Also confirm the application using the model, horsepower, engine family, parts diagram, or existing filter part number. Follow your Mercury owner's manual for the correct oil type, capacity, replacement interval, and service procedure.

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