Lower Unit Seal Kit – Fits Volvo Penta DPS-A DPS-B Sterndrives (Replaces 23020, 3888822)

Product Details

This Lower Unit Seal Kit – Fits Volvo Penta DPS-A DPS-B Sterndrives is designed for complete gearcase seal renewal on Volvo Penta DPS-A and DPS-B sterndrive models. Engineered to restore proper sealing integrity, this kit protects critical lower unit components from water intrusion and gear oil loss.

Direct replacement for Volvo Penta 3888822 and Orbitrade 23020, ensuring proper interchange and compatibility with factory service procedures.

• Comprehensive seal replacement for Volvo Penta DPS-A and DPS-B sterndrives
• Designed for lower unit service and rebuild applications
• Factory-compatible seal materials and dimensions

Part Number Matrix

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

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Technical Specs

Application

Lower unit gearcase seal service

Sterndrive Type

Volvo Penta DPS-A, DPS-B

Kit Type

Complete seal replacement kit

Replacement Interval

As needed during lower unit service or rebuild

What's in the Box

Package contents as supplied:

• Complete seal kit for lower unit service

Installation Notes

1. Drain all gear oil from the lower unit and remove the unit from the transom assembly following manufacturer service procedures.
2. Disassemble the lower unit housing carefully, keeping track of all fasteners and component orientation.
3. Remove all old seals, O-rings, and gasket material using appropriate seal removal tools; clean all mating surfaces thoroughly.
4. Inspect shafts, housings, and bearing surfaces for wear, scoring, or corrosion that may compromise new seals.
5. Install new seals using proper installation tools and techniques to avoid damaging seal lips or housings.
6. Lubricate seal lips with fresh gear oil during installation to ensure proper seating and initial protection.
7. Reassemble the lower unit following torque specifications and alignment procedures in the service manual.
8. Reinstall the unit to the transom assembly, refill with recommended gear oil, and check for leaks before operation.

Troubleshooting & FAQ

How do I know if my lower unit seals need replacement?

Common signs include visible gear oil leaking from the lower unit, milky or discolored gear oil indicating water intrusion, excessive oil consumption, or oil residue around the propeller shaft or drive housing seams.

Can I replace individual seals or do I need the complete kit?

While individual seals can technically be replaced, it is best practice to use a complete seal kit during lower unit service to ensure all sealing surfaces are renewed simultaneously, preventing future leaks from older seals.

What tools are required for seal installation?

Seal installation typically requires seal drivers or appropriately sized sockets, bearing pullers or seal removal tools, a torque wrench, gasket scraper, clean rags, and fresh gear oil for lubrication during assembly.

Will this kit work on both DPS-A and DPS-B models?

Yes, this seal kit is engineered to fit both Volvo Penta DPS-A and DPS-B sterndrive lower units. Always verify your specific model and serial number against the compatibility table before ordering.

How often should lower unit seals be replaced?

Seals should be replaced whenever the lower unit is disassembled for service, repair, or bearing replacement. Routine inspection during annual gear oil changes helps identify early signs of seal wear or failure.

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 against 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.