3/8" Inline Fuel Filter, 2-Pack – Fits Johnson/Evinrude, Mercury & Yamaha Applications
3/8" Inline Fuel Filter, 2-Pack – Fits Johnson/Evinrude, Mercury & Yamaha Applications is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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3/8" Inline Fuel Filter, 2-Pack – Fits Johnson/Evinrude, Mercu...
3/8" Inline Fuel Filter, 2-Pack – Fits Johnson/Evinrude, Mercury & Yamaha Applications is backordered and will ship as soon as it is back in stock.
Product Details
This 2-pack of 3/8-inch inline fuel filters is intended for marine fuel systems using 3/8-inch fuel hose. The clear or translucent housing allows visual inspection for visible debris and fuel condition. These aftermarket filters are suitable as replacement components where the listed dimensions and reference numbers match the original filter.
Reference applications include Johnson/Evinrude 398319, Mercury 802128A1, Yamaha GP1-U775C-10-00, Sierra 18-7831, GLM 40160, and Mallory 9-37960.
- In-line installation for 3/8-inch (approximately 10 mm) inside-diameter fuel hose.
- Barbed hose connections for compatible fuel lines and clamps.
- Clear housing supports visual inspection for contamination.
- Package includes two inline fuel filters.
Part Number Matrix
Use the reference numbers below as a starting point for compatibility checks. Confirm the hose size, filter orientation, and original filter dimensions before installation.
| Brand | Part Number | Notes |
|---|---|---|
| Johnson/Evinrude | 398319 / 360941 / 435918 / 765595 / 777715 | 398319 may also appear as 0398319; some numbers may be superseded references. |
| Mercury / Mariner | 802128A1 / 802128 | Reference for compatible 3/8-inch fuel-line applications. |
| Yamaha | GP1-U775C-10-00 | Reference for compatible 3/8-inch fuel-line applications. |
| Sierra | 18-7831 | Aftermarket reference. |
| GLM | 40160 | Aftermarket reference. |
| Mallory | 9-37960 | Aftermarket reference. |
Engine and Model Compatibility
Compatibility depends on the engine's installed fuel system, hose size, and required filter reference. Match the original filter to one of the numbers listed above rather than relying on engine brand or horsepower alone.
Johnson/Evinrude: Reference applications include various 2-stroke outboards using the listed filter numbers, including applications previously associated with 25–140 HP engines.
Mercury/Mariner: Reference applications include outboards using 802128A1 or 802128 with a compatible 3/8-inch fuel line.
Yamaha: Reference applications include outboards using GP1-U775C-10-00 with a compatible 3/8-inch fuel line.
| Brand | Model or Application | Rated HP | Stroke | Reference Part No. | Notes |
|---|---|---|---|---|---|
| Johnson/Evinrude | Various | 25–140 | 2-Stroke | 398319 | Also listed as 0398319 in some references. |
| Johnson/Evinrude | Various | Not specified | Not specified | 360941 / 435918 / 765595 / 777715 | Reference or superseded numbers; verify against the original filter. |
| Mercury / Mariner | Various | Not specified | Not specified | 802128A1 / 802128 | For compatible 3/8-inch fuel-line applications. |
| Yamaha | Various | Not specified | Not specified | GP1-U775C-10-00 | For compatible 3/8-inch fuel-line applications. |
Technical Specifications
- Product Type
- Inline fuel filter
- Package Quantity
- 2 filters
- Installation
- In-line
- Fuel System
- Gasoline fuel systems using a compatible filter and hose size
- Hose Size
- 3/8 inch (approximately 10 mm) inside-diameter fuel hose
- Connection
- Barbed hose ends
- Housing
- Clear or translucent plastic
- Thread Size
- Not applicable; barbed fittings
- Fuel Compatibility
- Use only with fuel types approved for the filter and the engine's fuel system.
What's in the Box
- 2 x inline fuel filters for compatible 3/8-inch fuel hose applications
Installation Notes
- Turn the engine off, allow it to cool, and follow the service manual's fuel-system safety instructions.
- Relieve fuel-system pressure when applicable, and place an absorbent rag or container beneath the filter.
- Note the flow direction marked on the original filter or replacement filter.
- Loosen the hose clamps and carefully remove the old filter while minimizing fuel spillage.
- Install the new filter with the flow arrow pointing from the fuel tank toward the engine.
- Push the fuel hoses fully onto the barbed ends and secure them with suitable hose clamps.
- Prime the fuel system according to the engine manufacturer's instructions.
- Inspect all connections for leaks before starting the engine and again after it runs.
Troubleshooting and FAQ
How do I know if this filter fits my engine?
Compare the original filter's part number, hose size, connection style, physical dimensions, and flow direction with the information on this page. The listed reference numbers include Johnson/Evinrude 398319, Mercury 802128A1, Yamaha GP1-U775C-10-00, Sierra 18-7831, GLM 40160, and Mallory 9-37960.
What are the signs of a clogged fuel filter?
Possible symptoms include hard starting, sputtering, loss of power, or stalling, particularly under load. A transparent housing may help reveal visible debris, but it does not replace proper fuel-system diagnosis.
When should the filter be replaced?
Replace the filter when it is contaminated, restricted, damaged, leaking, or when directed by the engine or fuel-system service instructions. Follow the maintenance schedule for your specific engine.
Can it be used with ethanol-blended fuel?
Use the filter only with fuel that is approved for the specific filter and engine fuel system. Follow the filter manufacturer's and engine manufacturer's fuel recommendations, especially when using ethanol blends.
Which direction should the filter face?
Install the filter so its flow arrow points away from the fuel tank and toward the engine. Do not install it against the marked flow direction.
Is this an OEM filter?
No. This listing is for an aftermarket replacement filter. The reference numbers identify potential application or interchange references and should be verified against the original component before purchase.
How quickly is it shipped?
Typical transit is 5–15 days. Available shipping methods and delivery estimates are shown at checkout and may vary by destination.
What is the warranty and return policy?
Warranty coverage and return eligibility are subject to the seller's current policy. Contact support with your order details if the product arrives damaged or an issue occurs during normal use.
Safety and Important Information
- Verify the part number, hose size, filter dimensions, connection style, and flow direction before ordering.
- Fuel is flammable. Work in a well-ventilated area away from flames, sparks, and ignition sources.
- Replace damaged hoses or clamps and check carefully for leaks after installation.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended when you are not familiar with marine fuel systems.
About Sea Sierra
- Marine Replacement Parts — Replacement components for compatible marine applications.
- Global Fulfillment — Shipping options and delivery estimates are provided at checkout.
- Helpful Support — Contact support with your order details for product or installation assistance.
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