Carburetor Float Bowl Gasket – Fits Evinrude/Johnson Outboard Engines (Replaces OMC 338880)

$4.99 $7.00

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Product Details

This aftermarket Carburetor Float Bowl Gasket is engineered for a precise fit on a wide variety of Evinrude and Johnson outboard engines. It creates a reliable seal between the carburetor body and the float bowl, preventing fuel leaks and ensuring proper engine function.

This part directly replaces OEM part number 338880 / 0338880 and is interchangeable with Sierra 18-2903, Mallory 9-61622, and GLM 32696 / 316331 / 777740.

Designed for a direct, leak-free installation.
Compatible with standard gasoline fuel systems.
Maintains proper fuel delivery for consistent engine performance.

Part Number Matrix

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

Brand	Part Number
OMC (OEM)	338880 / 0338880
Sierra	18-2903
Mallory	9-61622
GLM	32696 / 316331 / 777740

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This gasket fits a broad range of Evinrude and Johnson outboard models. Because specific compatibility data is not available, please verify that your existing part number matches one of the cross-references listed in the Part Number Matrix before ordering.

Technical Specs

Product Type: Carburetor Float Bowl Gasket
Installation: Direct Replacement
Fuel Type: Gasoline
OEM Part Number: 338880/0338880
Dimensions: 1.25″ L x 7.13″ W x 6.0″ H
Other Technical Attributes: For use on many Evinrude Johnson outboard engines

What’s in the Box

1x Float Bowl Gasket (replaces 338880/0338880)

Installation Notes

Disconnect the battery and shut off the fuel supply.
Carefully detach the fuel lines from the carburetor.
Remove the airbox/silencer to access the carburetor mounting bolts.
Unbolt and gently remove the carburetor from the engine.
Over a suitable container, remove the screws securing the float bowl.
Remove the old gasket, ensuring the mating surfaces on the bowl and carburetor body are clean and free of debris.
Install the new gasket, ensuring it is seated correctly in its groove.
Reinstall the float bowl, tightening the screws evenly in a crisscross pattern to avoid warping.
Re-mount the carburetor, reconnect fuel lines, and reinstall the airbox.
Turn on the fuel supply, check for leaks, and reconnect the battery before starting the engine.

Troubleshooting & FAQ

How do I know if this gasket fits my engine?

The best way to confirm compatibility is to match the part number from your old gasket or service manual to one of the numbers listed in our Part Number Matrix. While this part fits many Evinrude/Johnson models, confirming the number is essential.

What are the signs of a failing float bowl gasket?

Common symptoms include visible fuel leakage from the carburetor body, a strong smell of gasoline around the engine, poor or rough idling, and difficulty starting. A stained or wet appearance around the float bowl seam is a clear indicator.

Do I need to use sealant with this gasket?

No. This gasket is designed to create a seal on its own when installed correctly on clean, flat surfaces. The use of additional sealants can interfere with the seal and may cause the material to degrade prematurely.

How often should this gasket be replaced?

It is good practice to replace the float bowl gasket any time the carburetor is serviced or rebuilt. Otherwise, replace it immediately if you notice any signs of fuel leakage or damage.

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

Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
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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