Inline Fuel Filter – Fits Johnson/Evinrude & Mercury 3/8" (Replaces 398319, 802128A1)

Inline Fuel Filter – Fits Johnson/Evinrude & Mercury 3/8"

This inline fuel filter is designed for a wide range of Johnson/Evinrude outboard engines (4-250 HP, 1988-2004) and various Mercury outboard models. It is engineered for use with 3/8 inch (10mm) inside diameter fuel hoses, ensuring a clean and consistent fuel flow to protect critical engine components from contaminants.

This part is a direct replacement for Johnson/Evinrude part 398319 and Mercury parts 802128A1 / 802128.

• Installation: Universal inline fit for 3/8" (10mm) fuel lines.
• Filtration: Provides efficient 10-micron filtration.
• Fuel Compatibility: Approved for use with gasoline and 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 Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson/Evinrude Serial Number Guide.

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

• 1 x Inline Fuel Filter (Replaces 398319 / 802128A1)

Installation Guide

1. Safety First: Shut off the fuel supply and work in a well-ventilated area. Place a container under the filter to catch any fuel spills.
2. Locate Filter: Find the old fuel filter along the fuel line, typically between the fuel tank and the engine.
3. Remove Old Filter: Loosen the hose clamps on both ends of the filter. Gently twist and pull the fuel hoses off the old filter's barbs.
4. Check Flow Direction: Note the flow arrow on the new filter. It must point in the direction of fuel flow (from the tank towards the engine).
5. Install New Filter: Attach the fuel hoses to the correct ends of the new filter and secure them tightly with the hose clamps.
6. Final Check: Turn the fuel supply back on and check carefully for any leaks around the connections.
7. Prime and Start: Prime the engine's fuel system if needed, then start the engine and let it run to confirm proper operation.

Troubleshooting & FAQ

Q: How do I confirm this filter fits my engine?
A: This filter is designed for a universal fit on any engine with a 3/8" (10mm) fuel line. For specific models, check the compatibility table and cross-reference your original part number with the ones listed (e.g., Johnson/Evinrude 398319 or Mercury 802128A1).

Q: How often should I replace my fuel filter?
A: For optimal engine protection, it is recommended to replace your fuel filter every 50 operating hours or at least once per boating season, especially when using ethanol-blended fuels.

Q: What are the signs of a clogged fuel filter?
A: Common symptoms include engine sputtering, loss of power, difficulty starting, or stalling. These issues are often more noticeable at higher speeds or under load.

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.