Air Filter Assembly – Fits Mercruiser 3.0L TDI Diesel Engines (Replaces 35-8M6002131)

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Air Filter Assembly – Fits Mercruiser 3.0L TDI Diesel Engines (Replaces 35-8M6002131) is backordered and will ship as soon as it is back in stock.

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Product Details

This high-quality Air Filter Assembly is engineered for use with Mercruiser 3.0L TDI diesel engines, including the 100, 230, and 260 horsepower models. It ensures optimal engine protection by effectively filtering contaminants from incoming air.

This part is a direct replacement for Mercury Marine part number 35-8M6002131 and Mercruiser 8M6002131.

Installation Method: External Clamp-on
Compatible Fuel Type: Diesel

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Mercury Marine	35-8M6002131
Mercruiser	8M6002131

Engine & Model Compatibility

Confirm your engine model/year in the table below.

For Mercruiser Engines: Please verify your 3.0L TDI model is listed. As year ranges are not specified, matching by model name and OEM part number is critical.

Brand	Model	Rated HP	Stroke	OEM Part No.
Mercruiser	3.0L TDI 100 SD	100	4-Stroke	35-8M6002131
Mercruiser	3.0L TDI 230 IB	230	4-Stroke	35-8M6002131
Mercruiser	3.0L TDI 230 SD	230	4-Stroke	35-8M6002131
Mercruiser	3.0L TDI 260 IB	260	4-Stroke	35-8M6002131
Mercruiser	3.0L TDI 260 SD	260	4-Stroke	35-8M6002131

Technical Specs

Product Type: Air Filter Assembly
Installation: External
Fuel Type: Diesel
Connection: Clamp-on
Dimensions: Length: 105 mm (4.13 in), Width: 115 mm (4.53 in), Height: 150 mm (5.91 in)
Weight: 0.3 kg (0.66 lb)

What’s in the Box

1 x Air Filter Assembly

Installation Notes

Turn off the engine and ensure it is completely cool before starting.
Locate the existing air filter assembly on the engine.
Loosen the clamp securing the assembly to the air intake hose.
Carefully detach and remove the old unit.
Clean the surface of the intake connection point to ensure a proper seal.
Position the new air filter assembly onto the intake and tighten the clamp securely.
Start the engine and listen for any unusual whistling sounds that might indicate an air leak.

Troubleshooting & FAQ

How do I know if this air filter assembly is correct for my engine?

This filter is designed for Mercruiser 3.0L TDI diesel engines (100, 230, & 260 HP). The most reliable way to confirm fitment is by matching the OEM part number, which is 35-8M6002131 or 8M6002131. Always compare the product images and dimensions to your existing part before ordering.

What are the signs that my air filter needs to be replaced?

Common symptoms of a clogged or failing air filter include reduced engine performance, decreased fuel efficiency, black smoke from the exhaust, and unusual engine sounds. A visual inspection may also reveal a dirty or damaged filter element.

How often should I change the air filter on my Mercruiser diesel?

Replacement intervals can vary based on operating conditions (e.g., dusty or salty environments). As a general guideline, inspect the filter during routine service and replace it at least once per season or as recommended in your engine's service manual.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement, not an OEM component.
Professional installation is recommended for safety and performance.

About Sea Sierra

Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.

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