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Gasket 336530 – Fits Johnson/Evinrude Outboard Motors (Replaces 336530)

Sale price $1.57 Regular price $2.00
Shipping calculated at checkout.

Worry-free returns

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 Gasket 336530 is an aftermarket replacement part designed for various Johnson/Evinrude outboard motors. Please verify compatibility using your engine's service manual and part number, as specific model application data is limited.

It serves as a direct replacement for Johnson/Evinrude part number 336530 and is listed as an interchange for Sierra 18-0906 (unverified).

Part Number Matrix

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

Brand Part Number Notes
Johnson/Evinrude 336530 OEM Reference
Sierra 18-0906 Interchange (unverified)

Technical Specs

Product Type
Gasket
Dimensions
Height: 6.0 in; Width: 7.5 in; Length: 1.06 in

What’s in the Box

  • 1 x Gasket (336530)

Installation Notes

  1. Disconnect the battery and ensure the engine is cool.
  2. Drain any relevant fluids (e.g., oil, coolant) as specified in your service manual.
  3. Carefully remove the component that the old gasket seals.
  4. Remove the old gasket and any remaining debris or sealant from the mating surfaces.
  5. Ensure both mating surfaces are clean, dry, and flat.
  6. Position the new gasket correctly. Do not use sealant unless specified by the OEM manual for your application.
  7. Reinstall the component and torque all fasteners to the manufacturer's specifications in the correct sequence.
  8. Refill fluids, reconnect the battery, and start the engine.
  9. Check for any leaks and ensure proper operation.

Troubleshooting & FAQ

How do I know if this gasket fits my engine?

The most reliable method is to match the part number 336530 with the one listed in your engine's official service manual or parts diagram. Visual comparison with your old part is also recommended.

What are the signs of a failing gasket?

Common signs include fluid leaks (oil, coolant, or fuel), loss of pressure or compression, overheating, or poor engine performance. Any visible cracking or brittleness on the old gasket indicates it's time for a replacement.

Is any sealant or adhesive required for installation?

In most cases, this gasket is designed to be installed dry. Using gasket sealant can sometimes interfere with a proper seal. Always follow the specific instructions in your engine's service manual.

How often should this gasket be replaced?

Gaskets should typically be replaced whenever the component they seal is removed for service or repair. They are not usually replaced on a fixed time-based schedule but rather upon failure or during other maintenance.

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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