Lower Unit Seal Kit – Fits Volvo Penta DPS-A/DPS-B Sterndrives (Replaces 3888822)
Lower Unit Seal Kit – Fits Volvo Penta DPS-A/DPS-B Sterndrives (Replaces 3888822) 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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Lower Unit Seal Kit – Fits Volvo Penta DPS-A/DPS-B Sterndrives (Rep...
Product Details
This is an aftermarket Lower Unit Seal Kit – Fits Volvo Penta DPS-A/DPS-B Sterndrives (Replaces 3888822) designed to rebuild the lower unit gearcase on Volvo Penta DPS-A and DPS-B sterndrives. It is suitable for a variety of inboard/outboard applications using these specific drive models.
It serves as a direct replacement for Volvo Penta part number 3888822 and interchanges with Sierra 18-2584 and ORB23020.
- Engineered for gasoline sterndrive applications.
- Provides the necessary components for a standard lower unit gearcase rebuild.
- Helps prevent water intrusion and oil leaks, restoring performance and reliability.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3888822 |
| Sierra | 18-2584 |
| ORB | 23020 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | OEM Part No. |
|---|---|---|---|
| Volvo Penta | DPS-A | Various | 3888822 |
| Volvo Penta | DPS-B | Various | 3888822 |
Technical Specs
- Product Type
- Lower Unit Seal Kit
- Installation
- DPS-A and DPS-B Sterndrive Lower Units
- Fuel Type
- Gasoline
- Dimensions
- Height: 2.0 in, Width: 14.0 in, Length: 16.0 in
- Weight
- 0.07 LBS (0.032 kg)
- Other Technical Attributes
- For rebuilding sterndrive lower unit gearcase
What’s in the Box
- 1 x Lower Unit Seal Kit (Replaces 3888822)
Installation Notes
A safe, generic sequence for this installation is as follows. Your specific model may have different requirements.
- Disconnect the battery and ensure the engine is off.
- Drain the gearcase oil completely from the lower unit.
- Carefully remove the lower unit from the sterndrive assembly.
- Disassemble the unit, taking photos and notes of the position of all old seals, gaskets, and O-rings.
- Thoroughly clean all mating surfaces, removing any old sealant or corrosion.
- Carefully install the new seals and gaskets from the kit, ensuring correct orientation. Lubricate seals as needed.
- Reassemble the lower unit components according to manufacturer specifications.
- Reinstall the lower unit onto the sterndrive, torquing bolts to the proper specification.
- Refill the gearcase with the correct type and amount of fresh lubricant.
- After a brief run time, check carefully for any signs of water in the oil or oil leaking out.
Troubleshooting & FAQ
Will this kit fit sterndrive models other than DPS-A and DPS-B?
This kit is specifically designed and verified for Volvo Penta DPS-A and DPS-B sterndrives. It is not guaranteed to fit other models like DPS, DPS-C, or SX. Always verify compatibility with your part number.
What are the signs that my lower unit seals are failing?
The most common sign is milky or cloudy gear oil, which indicates water has mixed with the lubricant. Other signs include visible oil leaks from the propeller shaft or drain screws, or a strong smell of burnt gear oil.
Is this kit a complete rebuild kit?
This is a seal kit, containing the primary seals, gaskets, and o-rings needed to address leaks in the lower gearcase. It does not typically include bearings, gears, or other mechanical hardware.
How often should these seals be replaced?
There is no fixed replacement interval. Seals should be inspected for damage or leaks during annual service (e.g., when changing gear oil) and replaced proactively if the boat is used in harsh saltwater environments or if any signs of wear are visible.
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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