Air Filter Element – Fits MerCruiser Diesel 2.8L & 4.2L Engines (Replaces 35-805312, 805312)

Air Filter Element – Fits MerCruiser Diesel 2.8L & 4.2L Engines (Replaces 35-805312, 805312)

This high-quality aftermarket air filter element is engineered to fit a range of MerCruiser diesel engines, including the VM D2.8L (165hp), D254 (220hp), and D4.2L (200hp, 230hp, 250hp) models. It is also fully compatible with Cummins Mercruiser Diesel (CMD) 2.8 and 4.2 series engines.

As a direct replacement for Mercury/MerCruiser part numbers 35-805312 and 805312, this component ensures reliable performance and engine protection. It also replaces aftermarket parts from RecMar (REC35-805312), GHmarine (35-805312), and Seasierra (35-805312).

• Installation Method: Direct replacement for a secure, hassle-free fit.
• Engine Compatibility: Fits specific MerCruiser and Cummins MerCruiser Diesel engines.
• Fuel Type: Designed exclusively for diesel applications.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Confirm your engine model/year in the table below.

MerCruiser Diesel Engines

Cummins MerCruiser Diesel (CMD) Engines

Technical Specifications

Package Contents

• 1 x Air Filter Element (35-805312)

Explosion Diagram

Installation Guide

1. Safety First: Ensure the engine is turned off and completely cool before starting.
2. Locate Housing: Find the air filter housing on your engine.
3. Remove Cover: Unfasten the clips or screws securing the housing cover and remove it.
4. Extract Old Filter: Carefully take out the old air filter element, noting its orientation.
5. Clean Housing: Wipe away any dust or debris from inside the housing with a clean cloth.
6. Insert New Filter: Place the new air filter element into the housing, making sure it is properly seated.
7. Secure Cover: Re-attach the housing cover and fasten it securely.

Troubleshooting & FAQ

Q: How do I confirm this air filter fits my engine?
A: This filter is specifically designed for MerCruiser 2.8L & 4.2L models and CMD 2.8/4.2 series engines. To ensure a perfect match, please check your engine model and serial number against the "Compatible Engine Models" tables. Verifying that your old part carries the OEM number 35-805312 is also a reliable confirmation method.

Q: What are the signs that my air filter needs to be replaced?
A: Common indicators include a noticeable decrease in engine performance, increased fuel consumption, black smoke from the exhaust, or a filter element that is visibly dirty, clogged, or damaged. Regular inspection is key.

Q: How often should I replace my diesel engine's air filter?
A: While there is no universal schedule, a best practice is to inspect the air filter during routine maintenance (e.g., every 100 hours or annually) and replace it whenever it shows signs of contamination or wear.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.