Fuel Filter – Fits Mercury/Mariner 75-300 HP Outboards & MerCruiser 4.5L/6.2L (Replaces 35-8M0122423, 35-8M0060041)

Fuel Filter – Fits Mercury/Mariner 75-300 HP Outboards & MerCruiser 4.5L/6.2L

This high-quality in-line fuel filter is designed for a wide range of Mercury/Mariner outboards and MerCruiser sterndrive engines. It provides essential protection by filtering out harmful contaminants from the fuel system, ensuring reliable engine performance. It is compatible with Mercury/Mariner 75-300 HP 2-Stroke & 4-Stroke Optimax/Verado outboards (2003–2018) and MerCruiser 4.5L & 6.2L sterndrive engines (serial number 2A456613 and newer).

This filter serves as a direct replacement for several OEM and aftermarket part numbers, including Mercury 35-8M0122423, 35-8M0060041, 35-8M0020349, 35-884380T, Sierra 18-7981, and Mallory 9-37970.

• Filtration Rating: Filters particles down to 2 microns to protect sensitive fuel system components.
• Installation Method: Designed for simple in-line installation.
• Fuel Compatibility: Suitable for gasoline, including ethanol-blended fuels.

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.

Mercury/Mariner Outboard

MerCruiser Sterndrive

Technical Specifications

Package Contents

• 1 x Fuel Filter (Replaces 35-8M0122423 / 35-8M0060041 / 35-884380T)

Installation Guide

1. Safety First: Shut off the fuel supply at the tank and disconnect the boat's battery. Ensure the engine is cool.
2. Locate Filter: Find the existing fuel filter on your engine. It is typically a screw-in canister.
3. Prepare for Spillage: Place a rag or suitable container under the filter to catch any fuel that will spill when disconnected.
4. Remove Old Filter: Using a filter wrench, turn the old filter counter-clockwise to unscrew and remove it.
5. Prepare New Filter: Lightly lubricate the gasket of the new filter with clean engine oil.
6. Install New Filter: Screw the new filter on by hand until the gasket makes contact. Tighten it another 3/4 to one full turn. Do not overtighten.
7. Prime System: Reconnect the battery. Prime the fuel system according to your engine manufacturer's instructions to fill the new filter with fuel.
8. Check for Leaks: Once primed, carefully inspect the filter and its connections for any signs of fuel leaks before starting the engine.

Troubleshooting & FAQ

Q: How do I confirm this filter fits my engine?

A: First, check the "Part Number Cross-Reference" table to see if your old filter's part number is listed. Next, verify your engine's details (model, HP, year, and serial number) against the compatibility tables. For MerCruiser engines, this filter fits 4.5L & 6.2L models with serial number 2A456613 and newer. For outboards, ensure your model and year range (e.g., 2003–2018) are listed.

Q: What are the signs my fuel filter needs replacing?

A: Common signs of a clogged fuel filter include engine hesitation, loss of power, stalling, sputtering at high speeds, or difficulty starting. If your engine is running poorly, a blocked filter is a likely cause.

Q: How often should I replace my fuel filter?

A: As a general rule, you should replace your fuel filter annually or every 100 hours of operation, whichever comes first. However, always consult your engine's service manual for the specific maintenance interval recommended by the manufacturer.

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. Brand names and part numbers are used for identification purposes only.
• Professional installation is recommended to ensure safety and optimal performance. Improper installation can lead to fuel leaks and engine damage.

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.