Shaft Seal Kit (40mm) – Fits Volvo Penta (Replaces 828527)
Shaft Seal Kit (40mm) – Fits Volvo Penta (Replaces 828527) 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
Shaft Seal Kit (40mm) – Fits Volvo Penta (Replaces 828527)
Product Details
This Shaft Seal Kit (40mm) is a direct-fit rubber stuffing box designed for Volvo Penta applications requiring a 40mm propeller shaft and a 60mm stern tube. It serves as an essential below-waterline component to prevent water ingress while allowing the propeller shaft to rotate freely.
This kit provides a direct interchange for Volvo Penta OEM part number 828527.
- Water-lubricated design for reliable, low-friction performance.
- Designed for installation below the vessel's waterline.
- Includes essential lubricating grease for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 828527 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Designed for specific Volvo Penta models requiring a 40mm shaft seal for a 60mm stern tube.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Volvo Penta | KAMD42A | 828527 | With 40mm shaft, 60mm stern tube |
| Volvo Penta | General Applications | 828527 | For 40mm shafts with 60mm stern tube |
Technical Specs
- Product Type
- Rubber Shaft Seal / Stuffing Box
- Installation
- Below waterline
- Shaft Diameter
- 40mm
- Stern Tube Diameter
- 60mm
- Housing Material
- Rubber
- Product Dimensions
- 11.0cm L x 11.0cm W x 13.5cm H
- Recommended Maintenance
- Replace every 4 years or 500 hours
- Minimum Overlap (Shaft Sleeve)
- 38mm
- Other Technical Attributes
- Water-lubricated; Bleeding required on launch
What’s in the Box
- 1 x Seal Kit (828527)
- 1 x Lubricating Grease (828250)
Installation Notes
- Ensure the propeller shaft is clean, smooth, and free of burrs or sharp edges where the seal will slide.
- Apply a thin layer of the supplied grease to the inner lips of the new seal and onto the shaft to prevent damage.
- Carefully slide the new seal onto the shaft and into the stern tube, ensuring it is properly oriented and seated.
- Secure the seal's housing to the stern tube using appropriate hose clamps (not included).
- CRITICAL: Immediately after the boat is launched, you must "bleed" the seal by squeezing the rubber housing to purge trapped air. Continue until a steady drip of water appears, confirming it is properly water-lubricated.
Troubleshooting & FAQ
How do I know if this shaft seal will fit my boat?
Confirm your vessel uses a 40mm diameter propeller shaft and has a 60mm stern tube. This seal is specific to those dimensions. Always measure your existing hardware if you are unsure.
What are the signs my existing shaft seal is failing?
Common signs of a failing seal include excessive dripping from the stuffing box at rest or a spray of water when the shaft is turning. You may also see visible cracks, deformation, or perishing of the rubber housing.
How often should this seal be replaced?
The generally recommended maintenance interval is to replace the seal every 4 years or after 500 hours of engine use, whichever comes first, to prevent unexpected failure.
Do I need to bleed the air out of the seal after installation?
Yes, this is mandatory. This is a water-lubricated seal that uses the surrounding water to cool and lubricate itself. After launching the boat, squeeze the rubber housing to purge trapped air until water begins to drip through. Failure to do this will cause the seal to run dry, overheat, and fail rapidly.
Is this a genuine Volvo Penta part?
This is a high-quality aftermarket replacement, not an OEM part. It is engineered to meet or exceed original equipment specifications for fit, material, and performance.
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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