Gasket 336308 – Fits Johnson/Evinrude/OMC/BRP Outboard Motors (Replaces 336308)

$18.99 $30.00

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You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Delivery and Shipping

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This is a high-quality aftermarket Gasket 336308 designed for use in various Johnson, Evinrude, OMC, and BRP outboard marine engines. It ensures a proper seal to prevent fluid or gas leaks, which is critical for maintaining engine performance and integrity. Please verify your specific model requirements before ordering.

This part is a direct replacement for OEM part numbers OMC 336308 and BRP 336308.

Engineered to create a reliable seal on mating surfaces.
This package includes two gaskets for your convenience.
Designed for marine environments.

Part Number Matrix

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

Brand	Part Number
OMC	336308
BRP	336308

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Note: Comprehensive engine model and year compatibility information is limited. It is critical to match the part number (336308) stamped on your existing gasket or listed in your service manual.

Technical Specs

Product Type: Gasket
Dimensions: 24.0 x 14.0 x 0.3
Weight: Approximately 0.045 kg (0.1 lbs)
Warranty: 90-Day Warranty (Max Marine Outlet)

What’s in the Box

2 x Gasket (Replaces 336308)

Installation Notes

Disconnect the battery and ensure the engine is cool before starting work.
Carefully access the component where the gasket is located.
Remove the old gasket, taking care not to damage the mating surfaces.
Thoroughly clean both mounting surfaces to remove any old gasket material or sealant.
Position the new gasket correctly on the clean surface.
Reassemble the components and torque bolts to the manufacturer-specified values.
Reconnect the battery and run the engine to check for any leaks.

Troubleshooting & FAQ

How do I know if my old gasket has failed?

Signs of a failed gasket include visible fluid (oil, coolant, or fuel) leaks around the sealed component, poor engine performance, overheating, or unusual hissing sounds from the engine bay. A visual inspection for cracks or degradation on the old gasket is also a clear indicator.

Is any sealant required with this gasket?

This depends on the specific application and manufacturer recommendations. Some gaskets are designed to be installed dry, while others may require a thin layer of a specific type of sealant. Always consult your engine's service manual for the correct procedure for your model.

Can I reuse my old bolts/fasteners?

It is generally recommended to use new fasteners, especially if they are torque-to-yield bolts. However, if the original fasteners are in excellent condition and the service manual does not require replacement, they can sometimes be reused. Clean the threads thoroughly before reinstallation.

What is the difference between this and the OEM part?

Our aftermarket gasket is designed to meet or exceed OEM specifications for fit, form, and function. It is made from comparable materials to ensure a reliable, long-lasting seal in marine environments but is available at a more competitive price point.

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.

Payment & Security

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