Air Filter – Fits Mercury Outboard 115-225 HP V6 Engines (Replaces 35-853333T, 18-7997)

Air Filter – Fits Mercury Outboard 115-225 HP V6 Engines

This air filter is designed for Mercury Marine 115-225 HP 2-Stroke DFI/OptiMax V6 engines, from 1998–2002 and later models. It serves as a direct drop-in replacement, ensuring your engine breathes clean air for optimal performance and longevity.

It directly replaces several part numbers, making it a reliable aftermarket solution for maintaining your outboard motor. Proper air filtration is critical for protecting direct fuel injection (DFI) systems from contaminants.

• Installation: Simple drop-in replacement that fits the existing air box.
• Engine Compatibility: Specifically for DFI (Direct Fuel Injection) engines.
• Fuel Type: Designed for gasoline engines.

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.

Technical Specifications

Package Contents

This package contains:

• 1 x Air Filter Element (replaces 35-853333T)

Note: Package contents may vary by manufacturer. Some, like HeuroFosh and XLJOY, offer packs of two filters. Please verify the contents of the specific product you are purchasing.

Installation Guide

1. Safety First: Ensure the engine is turned off and cool to the touch. Disconnect the battery for safety.
2. Locate Air Box: Find the air filter housing (air box) on your engine. It is typically a plastic or metal box connected to the air intake.
3. Open Housing: Release the clips, or unscrew the fasteners holding the air box cover in place.
4. Remove Old Filter: Carefully take out the old air filter element. Note its orientation before removing it.
5. Clean Housing: Wipe the inside of the air box with a clean cloth to remove any dust, debris, or oil residue.
6. Insert New Filter: Place the new air filter into the housing, ensuring it is seated correctly and fits snugly.
7. Secure Cover: Re-attach the air box cover and secure it with the clips or screws.
8. Final Check: Reconnect the battery. Start the engine to ensure it runs smoothly.

Troubleshooting & FAQ

How do I confirm this fits my engine?
Start by checking the "Compatible Engine Models" table on this page. For Mercury engines, you can use the linked Serial Number Guide to verify your exact model and year, ensuring it matches the listed compatible models.

What are the signs of a failing air filter?
A clogged or failing air filter can cause reduced engine performance, decreased fuel efficiency, rough idling, or difficulty starting. If you notice these symptoms, it's a good time to inspect and potentially replace your air filter.

How often should I replace my air filter?
Replacement intervals depend on usage and operating conditions (e.g., saltwater vs. freshwater, dusty environments). As a general guideline, inspect the air filter annually and replace it if it appears dirty, clogged, or damaged.

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.