Inner Shaft Seal – Fits Volvo Penta DP-H and DP-R Sterndrives (Replaces 3863080)
Inner Shaft Seal – Fits Volvo Penta DP-H and DP-R Sterndrives (Replaces 3863080) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
Inner Shaft Seal – Fits Volvo Penta DP-H and DP-R Sterndrives (Repl...
Product Details
This replacement Inner Shaft Seal – Fits Volvo Penta DP-H and DP-R Sterndrives is engineered for a precise fit on a range of sterndrive models. It is installed behind the bearing carrier inside the drive, functioning as the inner of two seals responsible for preventing water intrusion and gear lube leaks.
This part is a direct replacement for Volvo Penta 3863080 and aftermarket interchanges like Anlidao PM23018.
- Installation Location: Sits behind the bearing carrier within the sterndrive unit.
- Sealing System: Works as part of a dual-seal assembly, requiring the companion outer seal (3863081) and O-rings (925260) for a complete installation.
- Function: Provides a critical barrier against gear oil leakage and water contamination in the drive.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3863080 |
| Anlidao | PM23018 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Designed for the following Volvo Penta sterndrive models.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Volvo Penta | DP-H | 3863080 | Inner of 2 seals behind bearing carrier |
| Volvo Penta | DPH-BP | 3863080 | Inner of 2 seals behind bearing carrier |
| Volvo Penta | DPH-A | 3863080 | Inner of 2 seals behind bearing carrier |
| Volvo Penta | DPH-B | 3863080 | Inner of 2 seals behind bearing carrier |
| Volvo Penta | DPH-C | 3863080 | Inner of 2 seals behind bearing carrier |
| Volvo Penta | DPH-D | 3863080 | Inner of 2 seals behind bearing carrier |
| Volvo Penta | DPH-D1 | 3863080 | Inner of 2 seals behind bearing carrier |
| Volvo Penta | DP-R | 3863080 | Inner of 2 seals behind bearing carrier |
| Volvo Penta | DPR-A | 3863080 | Inner of 2 seals behind bearing carrier |
| Volvo Penta | DPR-B | 3863080 | Inner of 2 seals behind bearing carrier |
| Volvo Penta | DPR-C | 3863080 | Inner of 2 seals behind bearing carrier |
Technical Specs
- Product Type
- Inner Shaft Seal
- Installation
- Behind bearing carrier in sterndrive
- Dimensions
- 1.5" H x 10.0" W x 10.0" L
- Other Technical Attributes
- Used with companion outer seal 3863081 and O-rings 925260
What’s in the Box
- 1 x Inner Shaft Seal (3863080)
Installation Notes
- Disconnect the boat's battery and ensure the sterndrive is in the full down position.
- Remove the propeller(s) and drain the gear lube from the sterndrive.
- Disassemble the sterndrive to gain access to the bearing carrier assembly, following the manufacturer's service manual procedures.
- Carefully remove the old bearing carrier, outer seal, and inner seal. Inspect the housing for any scoring or damage.
- Clean the seal seating area thoroughly to remove any old sealant, corrosion, or debris.
- Lubricate the new inner shaft seal with clean gear oil and press it squarely into its bore until fully seated. Ensure the seal lip faces the correct direction (typically towards the oil).
- Install the new companion outer seal and O-rings (sold separately) according to the service manual.
- Reassemble the sterndrive, refill with the correct specification of gear lube, and reinstall the propellers.
- Lower the drive into the water and check for any signs of leaks before operating the vessel.
Troubleshooting & FAQ
How do I know if my inner shaft seal is leaking?
The most common signs of a failing shaft seal are visible gear oil leaking from the propeller shaft area or water contaminating the sterndrive fluid. If you check your gear lube and it appears milky or creamy, it's a strong indication that water has breached the seals.
Is this the only seal I need for the repair?
No. This part is the inner seal of a two-part assembly. For a complete and reliable repair, you must also replace the companion outer seal (Volvo Penta 3863081) and the associated O-rings (925260). Replacing only one seal is not recommended and can lead to premature failure.
What happens if this seal fails?
Seal failure allows water to enter the sterndrive's gearcase and gear lube to leak out. This can quickly lead to catastrophic damage to bearings, gears, and other internal components due to a lack of lubrication and corrosion.
Is any special tool required for installation?
While not always mandatory, using a proper seal driver or a similarly sized socket is highly recommended to press the seal in evenly without damaging it. Always refer to your Volvo Penta service manual for specific tool recommendations.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
