Head Gasket (4 Pack) – Fits OMC Johnson Evinrude (Replaces OMC 329390)

$15.99 $25.00

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Product Details

This is a genuine new old stock (NOS) Head Gasket (4 Pack) – Fits OMC Johnson Evinrude (Replaces OMC 329390) for various outboard engines. These OEM replacement gaskets are from original factory inventory, ensuring precise fit and reliable performance.

This part serves as a direct interchange for part number 329390 from OMC, Johnson, and Evinrude.

Installation Location: Engine Head-to-Block
Condition: New Old Stock (NOS)
Package Includes: Four individual head gaskets

Part Number Matrix

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

Brand	Part Number
OMC	329390
Johnson	329390
Evinrude	329390

Engine & Model Compatibility

The source data for this part does not specify compatible engine models. We strongly recommend you consult an official OMC parts catalog or contact a dealer with your engine's model and serial number to verify fitment before purchasing.

Technical Specs

Product Type: Head Gasket (4-Pack)
Installation: Engine Head-to-Block
Dimensions: Approximately 6.0 x 7.13 x 1.13 in (152.4 x 181.1 x 28.7 mm)
Weight: 1 lb (0.45 kg)
OEM Number: 329390
Condition: New (NOS)
Package Quantity: 4-Pack
Warranty: 90-Day

What’s in the Box

4 x Head Gasket (OMC 329390)

Installation Notes

Disconnect the battery and drain the engine's cooling system completely.
Carefully remove the cylinder head cover and any components blocking access to the head bolts.
Loosen the cylinder head bolts in the sequence specified by the manufacturer's service manual to prevent head warping.
Remove the old head gasket and thoroughly clean both the cylinder head and engine block surfaces of any old gasket material or residue.
Position the new head gasket correctly on the engine block; ensure it is not installed upside down or backward.
Reinstall the cylinder head and torque the head bolts in the correct sequence and to the manufacturer-specified torque values.

Troubleshooting & FAQ

How do I confirm this gasket fits my engine?

Because specific models are not listed, the best way to confirm fitment is to check your engine's service manual or an official OMC parts catalog for part number 329390. Comparing the shape of your old gasket to the product photos can also be helpful.

What are common signs of a failed head gasket?

Symptoms of a blown head gasket include engine overheating, loss of compression, milky or discolored engine oil (from coolant mixing), white smoke coming from the exhaust, and bubbling in the coolant reservoir.

Is this a single gasket or a pack?

This listing is for a pack containing four (4) individual head gaskets.

What does "New Old Stock" (NOS) mean?

New Old Stock refers to original OEM parts that have never been sold or installed but may have been stored for a long time. They are genuine articles but may have minor cosmetic blemishes from storage that do not affect 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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