Oil Seal Kit – Fits Bombardier Watercraft (Replaces OEM 328603)
Oil Seal Kit – Fits Bombardier Watercraft (Replaces OEM 328603) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Oil Seal Kit – Fits Bombardier Watercraft (Replaces OEM 328603)
Product Details
This high-quality Oil Seal Kit – Fits Bombardier Watercraft is engineered to deliver reliable performance in Bombardier marine engines. It provides a secure seal to ensure proper engine lubrication and prevent costly oil leaks, protecting critical engine components from premature wear.
This kit serves as a direct replacement for Bombardier/BRP part number 328603.
- Designed for installation within the engine oil system.
- Effectively prevents oil leakage to maintain engine integrity.
- Helps maintain proper engine lubrication for optimal performance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Bombardier / BRP | 328603 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|
Technical Specs
- Product Type
- Oil Seal Kit
- Installation
- Engine Oil System
- Fuel Type
- Gasoline
- Quantity
- 2-pack
- Dimensions
- 1.0" H x 4.5" W x 4.5" L
- Weight
- 50g (0.11 lb)
- Warranty
- 1-year limited warranty against manufacturing defects
- Other Technical Attributes
- Prevents oil leakage, maintains proper engine lubrication
What’s in the Box
- 2 x Oil Seal (Replaces OEM 328603)
Installation Notes
- Ensure the engine is off and cool, and disconnect the battery for safety.
- Locate the existing oil seal that requires replacement. This may require removing other components to gain access.
- Carefully remove the old seal using a seal puller, taking care not to damage the housing or shaft surfaces.
- Thoroughly clean the seal bore and shaft, removing any old sealant, dirt, or corrosion.
- Lightly lubricate the new seal's inner and outer surfaces with clean engine oil.
- Position the new seal squarely and use a seal driver or a socket of the correct diameter to gently press it into place until fully seated.
- Reassemble all components in the reverse order of disassembly.
- Reconnect the battery, start the engine, and carefully inspect for any leaks.
Troubleshooting & FAQ
How do I know if this oil seal kit will fit my Bombardier watercraft?
This kit is a direct aftermarket replacement for OEM part number 328603. The most reliable way to ensure fitment is to verify this part number against your engine's service manual or the part you are replacing.
What are the signs of a failing oil seal?
Common indicators of a bad seal include visible oil leaks on or under the engine, a consistent drop in oil level without other causes, or a burning oil smell.
Should I replace both seals even if only one is leaking?
Yes. This kit includes two seals. Since seals are exposed to the same operating conditions and tend to wear at a similar rate, it is highly recommended to replace them as a set to ensure consistent reliability.
Are special tools required for installation?
While basic tools might suffice, using a dedicated seal puller for removal and a seal driver set for installation is strongly recommended. These tools prevent damage to the new seal and the engine housing during the process.
How often should engine oil seals be replaced?
Oil seals do not have a fixed replacement schedule. They should be inspected during major services or whenever related components are disassembled and replaced at the first sign of brittleness, cracking, or leakage.
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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