Exhaust Manifold Gasket – Fits Outboard Marine Corp (OMC) Boats (Replaces 323469)

$8.95 $14.00

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Product Details

This Exhaust Manifold Gasket – Fits Outboard Marine Corp (OMC) Boats (Replaces 323469) is engineered for a precise fit on a range of OMC, Evinrude, and Johnson outboard engines. It provides a reliable seal for the boat's exhaust system, preventing damaging gas and water leaks to ensure optimal engine performance.

This part serves as a direct cross-reference for OEM part numbers including OMC 323469, Evinrude 323469, Johnson 323469, and BRP US Inc 323469.

Installs as a direct replacement for the original part.
Designed for marine use in boat exhaust systems.
Officially cataloged with NSN (NATO Stock Number): 5330-01-264-3548.

Part Number Matrix

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

Brand	Part Number	Notes
OMC	323469
Evinrude	323469
Johnson	323469
BRP US Inc	323469	CAGE Code: 1UVT5

Engine & Model Compatibility

Confirm your engine model and year in the table below. Compatibility is determined by the OEM part number.

For Evinrude engines, a user has confirmed fitment on a 1967 100 HP 90 cid model. Please verify your specific application requires part number 323469.

Brand	Rated HP	Years	OEM Part No.	Notes
Evinrude	100	1967	323469	Fits 1967 90 cid models per user review

Technical Specs

Product Type: Exhaust Manifold Gasket
Installation: Direct replacement
Application: Boat Exhaust System
Dimensions: Height: 0.5 in; Width: 18.0 in; Length: 27.0 in
NSN (NATO Stock Number): 5330-01-264-3548

What’s in the Box

1 x Exhaust Manifold Gasket (323469)

Installation Notes

Professional installation is recommended. The following are general, model-agnostic steps:

Disconnect the battery and allow the engine to cool completely.
Carefully remove the exhaust manifold and discard the old gasket.
Thoroughly clean both the manifold and engine block mating surfaces. Ensure they are free of old gasket material, carbon, and debris.
Position the new gasket, making sure it lines up perfectly with all bolt holes.
Reinstall the exhaust manifold and tighten the bolts in the sequence and to the torque specifications outlined in your engine's service manual.

Troubleshooting & FAQ

How do I know if my exhaust manifold gasket is failing?

Common signs of a bad gasket include visible exhaust or water leaks around the manifold, milky or discolored engine oil (indicating water intrusion), engine overheating, or a noticeable loss of power and performance.

Will this fit my specific engine model? The table is limited.

This gasket is a direct replacement for part number 323469. The best way to ensure fitment is to verify this is the correct part number for your specific engine model and year. A user confirmed it "lined up perfect" on a 1967 100 HP 90 cid Evinrude outboard.

Do I need to use sealant with this gasket?

Generally, this type of gasket is designed for a dry installation. However, always consult your engine's official service manual for the most accurate procedure, as some applications may have specific requirements.

What causes an exhaust manifold gasket to fail?

Failure is often caused by age, heat cycles causing the material to become brittle, corrosion from saltwater exposure, or improper installation (uneven torque).

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 and specifications against 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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