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

$18.75

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Product Details

This universal 3/8" Inline Fuel Filter is designed for a broad range of Johnson/Evinrude and Mercury/Mariner outboard engines, primarily from 1988 to 2004. It effectively screens out contaminants to protect your engine's fuel system, ensuring reliable performance on the water. Its clear housing allows for quick visual inspection of fuel flow and filter condition.

It serves as a direct interchange for Sierra 18-7831, GLM 40160, Mallory 9-37960, Fram G3/G15, Johnson/Evinrude 398319/360941, and Mercury 802128/802128A1.

Features universal inline installation for 3/8" (9.5mm) fuel lines.
Provides 10-micron filtration suitable for gasoline and ethanol-blended fuels.
Constructed with sonically sealed end caps for enhanced durability and leak prevention.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Sierra	18-7831
GLM	40160
Mallory	9-37960
Fram	G3 / G15
Johnson/Evinrude	398319 / 360941
Mercury	802128 / 802128A1
Wix	33033

Engine & Model Compatibility

Confirm your engine model/year in the table below.

For Johnson/Evinrude, this filter fits a wide array of 2-stroke and 4-stroke outboards from 4 HP to 250 HP manufactured between 1988 and 2004.

For Mercury/Mariner, compatibility is similarly broad. Always consult your service manual or application guide to confirm fitment for your specific model.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Johnson/Evinrude	Various models	4-250 HP	2-Stroke & 4-Stroke	1988–2004	398319, 360941	Typical service interval: 50 hours or annually
Mercury	Various models	Various	2-Stroke & 4-Stroke		802128, 802128A1	Check application guide for specific models

Technical Specs

Product Type: Inline Fuel Filter
Installation: Inline, Universal
Filtration Rating: 10 micron
Fuel Type: Gasoline, Ethanol blends
Connection: 3/8" (9.5mm) hose barbs
Housing Material: Plastic with metal end caps
Housing Color: Clear/Translucent with black ends
Fitting Type: Barbed hose connection
Thread Size: N/A (non-threaded)
Other Technical Attributes: Sonically sealed end caps, approved for ethanol-based fuels

What’s in the Box

1 x Inline Fuel Filter (Sierra 18-7831, Johnson/Evinrude 398319, Mercury 802128A1)

Installation Notes

Ensure the engine is off and cool. Work in a well-ventilated area away from sparks or flames.
Place a fuel-safe container or absorbent rags under the old filter to catch any spills.
Loosen the hose clamps on both sides of the existing filter and gently twist the hoses to remove it.
Note the fuel flow direction arrow on the new filter. It must point from the fuel tank towards the engine.
Install the new filter by connecting the hoses to the correct barbs, ensuring the flow direction is correct.
Securely tighten the hose clamps on both ends. Do not overtighten, as this could damage the housing.
Prime the fuel system according to your engine's manual (e.g., by squeezing the primer bulb) until the filter is full and the bulb is firm.
Check carefully for any leaks around the filter and connections before starting the engine.
Start the engine and check again for leaks.

Troubleshooting & FAQ

How can I confirm this filter fits my specific engine?

The best way is to cross-reference the part numbers listed in the "Part Number Matrix" with your engine's service manual or the number on your old filter. While it fits a wide range of Johnson/Evinrude and Mercury models from 1988–2004, verifying the OEM part number is the most reliable method.

What are the signs of a clogged or failing fuel filter?

Common symptoms include engine hesitation, loss of power, stalling (especially at low speeds), difficulty starting, or rough idling. A visual inspection of the clear housing may also show sediment or debris.

How often should I replace this filter?

For optimal engine protection, it is recommended to replace the inline fuel filter after every 50 hours of operation or at least once per boating season, whichever comes first.

Is this filter compatible with ethanol-blended fuels like E10?

Yes, this filter is approved for use with modern gasoline, including ethanol-based blends such as E10. The materials are designed to resist deterioration from ethanol.

What is the correct orientation for installation?

The filter is directional. An arrow is typically marked on the housing indicating the direction of fuel flow. Ensure this arrow points from the fuel tank towards the engine for proper filtration and performance.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost?

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns?

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement, not an OEM component.
Professional installation is recommended for safety and performance.

About Sea Sierra

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Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.

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