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Gasket – Fits Bombardier Marine Engines (Replaces OEM 330689)

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Gasket – Fits Bombardier Marine Engines (Replaces OEM 330689) is backordered and will ship as soon as it is back in stock.


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 aftermarket Gasket – Fits Bombardier Marine Engines (Replaces OEM 330689) is an OEM-quality replacement built for specific Bombardier marine engine applications. It ensures a reliable seal for optimal engine performance and longevity.

This part is a direct interchange for Bombardier part number 330689.

Part Number Matrix

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

Brand Part Number
Bombardier 330689

Technical Specs

Product Type
Gasket
Dimensions
6.0" (H) x 11.25" (W) x 0.13" (L)

What’s in the Box

  • 1 x Gasket (OEM 330689)

Installation Notes

  1. Ensure the engine is cool and disconnect the battery before starting.
  2. Drain any relevant fluids, like coolant or oil, to prevent spills during removal.
  3. Carefully remove the component where the old gasket is seated.
  4. Thoroughly clean both mating surfaces, ensuring they are free of old gasket material, debris, and oil.
  5. Position the new gasket correctly onto the component. Do not use sealant unless specified by the engine's service manual.
  6. Re-install the component, tightening bolts to the manufacturer's specified torque and in the correct sequence.
  7. Once assembled, refill any drained fluids, reconnect the battery, and run the engine to check for leaks.

Troubleshooting & FAQ

What are the signs of a failed gasket?

Common signs include fluid leaks (oil, coolant), engine overheating, loss of compression, poor engine performance, or visible cracks and brittleness on the old gasket upon inspection.

Can I reuse my old gasket?

No. Gaskets are single-use components designed to crush and create a seal. Reusing one will likely result in leaks and improper performance. Always replace with a new one.

Do I need to use sealant with this gasket?

It is generally not recommended to use sealant unless explicitly required by your engine's service manual. This gasket is designed to seal on its own when installed on clean, flat surfaces.

How do I know if this gasket fits my engine?

Confirm the part number required for your engine by checking your service manual or the old part. Cross-reference this with the numbers in our Part Number Matrix. When in doubt, consult a professional marine mechanic.

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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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

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