Volvo Penta Sealing Ring 181620 – OEM Oil Seal
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Volvo Penta OEM Sealing Ring – Part No. 181620
Part Number: 181620
Alternate Format: 181620-6
Brand: Volvo Penta
Product Type: Sealing Ring / Oil Seal
System: Sterndrive — Shaft Sealing, Outdrive & Engine Service
Diagram Position: Astern lever / DP-A2 assembly; also used in SX, DP, and DPX drive shaft sealing locations
Dimensions: Reported as 32 × 42 × 4 mm or 35 × 42 × 4 mm depending on application — verify by measuring the original
Sold As: Individual seal
The Volvo Penta 181620 is a genuine OEM sealing ring used in sterndrive and marine engine shaft sealing applications. It is listed by Volvo Penta as an active OEM part and appears in DP-A2 drive diagrams as a component of repair kit 876265 for the astern lever assembly. It is also referenced for shaft sealing across older SX, DP, and DPX sterndrive families.
Compatible Applications
- Volvo Penta SX sterndrive — shaft sealing applications, approx. 1983–1998
- Volvo Penta DP sterndrive — shaft sealing applications, approx. 1983–1998
- Volvo Penta DPX sterndrive — shaft sealing applications, approx. 1983–1998
- Volvo Penta DP-A2 — astern lever assembly (diagram component of repair kit 876265)
- Compatible across 4-cylinder, 6-cylinder, and V8 engine configurations in the above drive families
Fitment must be confirmed by the exact drive model and serial number before ordering. Two dimensional specifications appear in public references (32 × 42 × 4 mm and 35 × 42 × 4 mm) — always measure the original removed seal and verify your drive serial number to ensure correct fit.
Supersession & Cross-Reference
- Active OEM Number: 181620
- Alternate OEM Format: 181620-6
- Aftermarket Equivalents: Sierra 18-2057, GLM 87070, EMP 26-01462
- No confirmed Volvo Penta supersession to a newer number has been identified. Verify current OEM status by serial number at time of ordering.
When This Seal Needs Replacement
Replace the 181620 when the original shows any of the following during outdrive or engine service:
- Oil or gear lube leakage from the sealed shaft area
- Hardening, cracking, or deformation of the seal lip
- Visible wear, scoring, or damage to the sealing surface
- Any sign the seal is no longer maintaining a clean barrier against contamination
Replacement is typically performed during outdrive or astern lever service, or whenever the drive is disassembled and the seal is exposed.
Installation Notes
- Measure the original removed seal before installing the replacement — confirm OD, ID, and width match given the conflicting dimensional references in public sources
- Inspect the shaft journal and housing bore for wear or scoring before assembly
- Press the seal in squarely and to the correct depth — refer to the Volvo Penta service manual for the applicable drive
- Lubricate the seal lip lightly with clean gear oil before installation
- If servicing the DP-A2 astern lever assembly, confirm whether repair kit 876265 is the appropriate service kit for your configuration
Technical FAQ
Q: Which dimension is correct — 32 × 42 × 4 mm or 35 × 42 × 4 mm?
A: Both appear in public references for 181620. The safest approach is to measure your original removed seal and confirm by drive serial number. Do not order based on dimension alone.
Q: Is this the same seal as Sierra 18-2057?
A: Sierra 18-2057, GLM 87070, and EMP 26-01462 are listed as aftermarket equivalents in current interchange references. Verify the application and dimensions match your specific drive before substituting.
Q: What is repair kit 876265?
A: 876265 is the Volvo Penta DP-A2 astern lever repair kit, which includes 181620 as a component. If you’re doing a full astern lever service on a DP-A2, confirm whether the complete kit is more appropriate than sourcing the seal individually.
Q: Is 181620 still an active Volvo Penta part number?
A: Yes — 181620 is listed as an active genuine OEM part. Confirm current availability by serial number when ordering, as older drive parts can become limited over time.
Parts Desk Insights
Best Use Case: Outdrive service or astern lever rebuild on older Volvo Penta SX, DP, or DPX drives. This is a small but important seal — best replaced any time the drive is open and the seal is accessible, rather than waiting for a leak to develop.
Common Issue: The conflicting dimensional data in public sources (32 vs. 35 mm ID) is the most frequent source of confusion with this part. The reliable fix is straightforward: measure the original before ordering. Customers who order on part number alone without measuring occasionally receive a seal that matches the OEM number but not their specific production-run shaft size. Serial-number confirmation and direct measurement of the original are the two checkpoints that eliminate this problem.
Related Parts
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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