Inline Fuel Filter – Yamaha, Mercury/Mariner, Tohatsu/Nissan & Honda 4–20 HP Applications

Product Details

This aftermarket inline fuel filter is intended for selected small marine outboard applications from Yamaha, Mercury/Mariner, Tohatsu/Nissan, and Honda. Installed in the fuel line between the fuel tank and the engine, it helps screen debris and contaminants before they reach the engine fuel system.

The filter is supplied as a single replacement component. It is not an OEM-branded part. Use the reference numbers and application information below together with your engine model, year, stroke, and existing filter before ordering.

• Inline installation in the fuel hose between the tank and engine.
• Compatible application references are listed by manufacturer below.
• Install in the same fuel-flow direction as the original filter and follow the arrow on the filter body when present.
• Designed for gasoline marine outboard fuel systems within the listed applications.

Part Number Matrix

The following manufacturer and aftermarket references are associated with this replacement filter. A reference number alone does not replace verification of the complete engine application.

Engine & Model Compatibility

The applications below reflect the available product application records. Yamaha fitment is shown with the specific year and stroke conditions provided. Mercury/Mariner, Tohatsu/Nissan, Honda, and Johnson/Evinrude references are listed by the stated horsepower range; confirm the exact engine model and serial-number range before installation.

Technical Specifications

Product Type

Inline fuel filter

Product Configuration

Single replacement filter

Fuel Type

Gasoline marine outboard fuel systems

Installation Location

In the fuel line between the fuel tank and engine

Connection Style

Inline hose connection; confirm hose size and connection details against the original filter before installation

Brand Status

Aftermarket replacement; not an OEM-branded component

Aftermarket Reference

18-7710-1; selected records also list 18-7712 and 18-8225 for Honda applications

What's in the Box

• 1 × Inline fuel filter

Installation Notes

1. Switch off the engine, allow it to cool, and close the fuel supply where applicable.
2. Work in a well-ventilated area away from flames, sparks, and other ignition sources.
3. Place an absorbent cloth or suitable container beneath the existing filter to catch fuel.
4. Before removing the old filter, note its installation direction and hose routing.
5. Disconnect the hoses from the old filter and inspect the hose ends and clamps for damage or deterioration.
6. Install the replacement filter in the same fuel-flow direction. If an arrow is marked on the filter, point it toward the engine.
7. Secure the fuel hoses firmly with suitable clamps and ensure the connections are fully seated.
8. Restore the fuel supply and prime the system according to the engine manufacturer's procedure.
9. Start the engine only after checking for fuel leaks. Stop immediately if leakage is present.

Maintenance & Troubleshooting

Safety & Important Information

• Fuel is flammable. Keep the work area ventilated and away from ignition sources.
• Relieve or control fuel pressure according to the engine manufacturer's service procedure before disconnecting fuel lines.
• Confirm the exact model, year, stroke, serial-number range, hose size, and original filter reference before purchase.
• Do not install a filter that is damaged, contaminated, or unsuitable for the engine's fuel system.
• Professional installation is recommended if you are not experienced with marine fuel-system service.

About Sea Sierra

• Marine Replacement Parts — We provide aftermarket components for repair and maintenance of marine engines.
• Application-Focused Listings — Product references and fitment information are organized to help you compare your engine and original part.
• Practical Service Support — Always use the engine manufacturer's service information for installation, inspection, and maintenance procedures.