Lower Unit Seal Kit – Fits Volvo Penta AQ 200-290 Series Single Prop (Replaces 876268, GLM87780)
Lower Unit Seal Kit – Fits Volvo Penta AQ 200-290 Series Single Prop (Replaces 876268, GLM87780) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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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 AQ 200-290 Series Single Pro...
Product Details
This Lower Unit Seal Kit – Fits Volvo Penta AQ 200-290 Series Single Prop (Replaces 876268, GLM87780) is designed for a complete lower unit service on Volvo Penta AQ 200 through 290 series single-propeller sterndrives. The kit provides the necessary seals and O-rings to restore watertight integrity and prevent gear oil leaks.
This kit is a direct replacement for Volvo Penta part number 876268 and aftermarket equivalent GLM 87780.
- Engineered for single propeller drive applications.
- Includes components for a complete lower unit reseal.
- Designed to meet or exceed original equipment specifications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 876268 |
| GLM | 87780 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This seal kit is designed for the Volvo Penta AQ series sterndrives listed below that use a single propeller.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Volvo Penta | AQ 200 Series | 876268 | Single prop only |
| Volvo Penta | AQ 225 Series | 876268 | Single prop only |
| Volvo Penta | AQ 260 Series | 876268 | Single prop only |
| Volvo Penta | AQ 271 Series | 876268 | Single prop only |
| Volvo Penta | AQ 290 Series | 876268 | Single prop only |
Technical Specs
- Product Type
- Lower Unit Seal Kit
- Installation
- Complete Lower Unit Service
- Compatible Drives
- For single propeller drives only
- Product Dimensions
- 15" L x 10" W x 4" H
What’s in the Box
- Complete set of lower unit seals and O-rings for service.
Installation Notes
- Drain the gear lube from the lower unit completely.
- Separate the lower unit from the upper housing assembly.
- Disassemble the lower unit components, including the propeller shaft housing and driveshaft bearing carrier.
- Carefully remove all old seals and O-rings, taking note of their orientation.
- Thoroughly clean all sealing surfaces, ensuring they are free of old sealant, corrosion, and debris.
- Lubricate the new seals and O-rings with a light coat of marine grease before installation.
- Install the new seals and O-rings in their correct positions. Use appropriate seal drivers to ensure they are seated properly and not damaged.
- Reassemble the lower unit, torquing all fasteners to the manufacturer's specifications.
- Pressure and vacuum test the gearcase to confirm a proper seal before refilling with new gear lube.
Troubleshooting & FAQ
What are the signs that my lower unit seals are failing?
Common signs include milky or cloudy gear lube (indicating water intrusion), visible oil leaks around the propeller shaft or driveshaft, or a frequent need to top off the gear lube. A failed pressure/vacuum test during service is a definitive sign of a leak.
Is this kit for single-prop or dual-prop (Duoprop) drives?
This seal kit is specifically for Volvo Penta single-propeller sterndrives in the AQ 200-290 series. It is NOT compatible with Duoprop models, which require a different seal kit.
How often should lower unit seals be replaced?
Lower unit seals should be inspected annually when you change the gear lube. It is recommended to replace them every 2-3 years as part of preventative maintenance, or immediately if you notice any signs of leaks or water contamination.
Can I install this kit myself?
While DIY installation is possible for experienced marine mechanics, it requires specialized tools like a seal puller, seal drivers, and pressure/vacuum testing equipment. To ensure a leak-free installation and prevent damage, professional installation is highly recommended.
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.
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