3/8-Inch Inline Fuel Filter for Johnson/Evinrude and Mercury/Mariner – Replaces 398319, 802128A1
3/8-Inch Inline Fuel Filter for Johnson/Evinrude and Mercury/Mariner – Replaces 398319, 802128A1 is backordered and will ship as soon as it is back in stock.
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3/8-Inch Inline Fuel Filter for Johnson/Evinrude and Mercury/Marine...
3/8-Inch Inline Fuel Filter for Johnson/Evinrude and Mercury/Mariner – Replaces 398319, 802128A1 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket 3/8-inch inline fuel filter is intended for fuel systems using 3/8-inch fuel hose. It is listed for Johnson/Evinrude outboards and Mercury/Mariner applications and is designed to help remove contaminants from the fuel before it reaches the engine. The clear-style housing shown in the product image allows the filter condition and fuel flow to be checked visually when installed in an accessible location.
This filter is commonly cross-referenced with Sierra 18-7831. Listed OEM or manufacturer reference numbers include Johnson/Evinrude 360941, 398319, 777715, 765595, 435918, and 175227, plus Mercury/Mariner 802128 and 802128A1. Reference numbers are provided for identification; always confirm hose size and the part number used by your specific engine.
- Inline replacement fuel filter for 3/8-inch fuel hose.
- Aftermarket replacement for selected Johnson/Evinrude and Mercury/Mariner applications.
- Helps screen fuel-system contaminants before they reach the engine.
- Use the original filter, engine service information, and hose size to confirm suitability before installation.
Part Number Matrix
The following numbers are customer-facing OEM, manufacturer, or aftermarket reference numbers associated with this filter.
| Brand or Source | Reference Number |
|---|---|
| Sierra | 18-7831 |
| Johnson/Evinrude | 360941, 398319, 777715, 765595, 435918, 175227 |
| Mercury/Mariner | 802128, 802128A1 |
| GLM | 40160 |
| Mallory | 9-37960 |
| Fram | G3, G15 |
| Wix | 33033 |
Engine and Model Compatibility
This filter is associated with Johnson/Evinrude outboard fuel-filter references and Mercury/Mariner reference numbers. The available product information does not establish one universal model, horsepower, year, serial-number, shaft-length, or stroke range.
Before ordering, compare the reference number on your existing filter or service documentation and confirm that your fuel line uses a 3/8-inch hose. A matching brand alone is not sufficient to confirm fitment for every engine.
| Brand | Application Reference | Hose Size | Fitment Note |
|---|---|---|---|
| Johnson/Evinrude | 360941, 398319, 777715, 765595, 435918, 175227 | 3/8 inch | Confirm the exact engine application and existing filter number. |
| Mercury/Mariner | 802128, 802128A1 | 3/8 inch | Confirm the exact engine application and fuel-line size. |
Technical Specifications
- Product Type
- Inline fuel filter
- Product Configuration
- Single replacement filter; not a kit
- Installation
- Inline installation in a 3/8-inch fuel hose
- Hose Connection
- 3/8-inch hose connection
- Aftermarket Reference
- Sierra 18-7831
- Application References
- Johnson/Evinrude and Mercury/Mariner fuel-filter references listed above
- Thread Size
- Not applicable; this is an inline hose-connected filter
- Filtration Rating
- Not specified in the company product record
- Material and Fuel Certification
- Not specified in the company product record
What's in the Box
- 1 x aftermarket inline fuel filter
Hose, clamps, fittings, and other accessories are not stated as included. The product is listed as a single filter rather than a kit.
Installation Notes
- Turn off the engine and allow it to cool. Work outdoors or in a well-ventilated area away from sparks, flames, and other ignition sources.
- Place an approved fuel container or absorbent material beneath the filter to catch fuel.
- Confirm that the replacement filter has the same hose size and reference application as the filter being removed.
- Note the flow-direction marking on the replacement filter, if present, before connecting the hoses.
- Remove the old filter and connect the fuel hoses to the replacement filter. If the filter has a flow arrow, point it toward the engine.
- Secure the hose connections with suitable fuel-system clamps. Do not overtighten or damage the filter housing.
- Prime the fuel system according to the engine manufacturer's instructions.
- Inspect the filter and both connections for fuel leaks before starting the engine.
- Start the engine only after confirming that there are no leaks, then check the connections again while the engine is running.
Troubleshooting and FAQ
How can I confirm this filter fits my engine?
Compare your original filter's reference number with the numbers listed in the Part Number Matrix, verify the fuel hose is 3/8 inch, and consult your engine service manual or application guide. Year, horsepower, stroke, and serial-number fitment should not be assumed from the brand name alone.
What are common signs of a restricted fuel filter?
Possible symptoms include hard starting, hesitation, loss of power, stalling, rough running, or reduced fuel flow. These symptoms can have other causes, so inspect the complete fuel system before replacing parts.
How often should the filter be replaced?
Replace the filter according to the engine manufacturer's maintenance schedule, or sooner if it is contaminated, damaged, leaking, or restricting fuel flow. No fixed service interval is specified for this product in the available company record.
Is this an OEM filter?
No. This listing is for an aftermarket replacement filter. The listed OEM and manufacturer numbers are reference numbers used to help identify compatible applications; the filter itself is not sold as a genuine OEM component.
Does the package include a complete installation kit?
No. The company product record identifies this item as a single fuel filter, not a kit. Hoses, clamps, fittings, and other installation parts are not stated as included.
What should I do if the filter or connection leaks?
Stop the engine immediately, eliminate ignition sources, and contain the fuel safely. Do not operate the engine until the cause of the leak has been corrected and the connections have been inspected.
Safety and Important Information
- Verify the reference number, hose size, and physical configuration against your original filter before purchase.
- Fuel-system work involves flammable fuel. Follow the engine manufacturer's safety instructions and applicable local requirements.
- This is an aftermarket replacement, not a genuine OEM component.
- Do not rely on brand, horsepower, year, or stroke alone to establish fitment.
About Sea Sierra
- Marine Replacement Parts — We offer aftermarket components for routine marine maintenance and repair.
- Application-Focused Listings — Reference numbers and installation details are provided to help customers compare replacement parts.
- Support for Proper Selection — Confirm the original part number, hose size, and engine documentation before ordering.
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