Volvo Penta Rubber Packing Box 3819723 – Fits 50mm Propeller Shaft (Sealing Sleeve Kit)
Volvo Penta Rubber Packing Box 3819723 – Fits 50mm Propeller Shaft (Sealing Sleeve Kit) 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
Volvo Penta Rubber Packing Box 3819723 – Fits 50mm Propeller Shaft ...
Product Details
This Volvo Penta Rubber Packing Box 3819723 is a marine propeller shaft sealing sleeve kit designed for 50mm propeller shafts with a 70mm exterior diameter shaft sleeve. It provides a water-lubricated, effective seal at all speeds.
This part serves as a direct replacement for Volvo Penta part numbers 3819723 and 888737 (seal number).
- Designed for marine propulsion propeller shaft installation.
- Water-lubricated for effective sealing at all operating speeds.
- Requires greasing every 200 hours or annually for maintenance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 3819723 | Primary Part Number |
| Volvo Penta | 888737 | Alternate Seal Number |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Volvo Penta | D4-145I-G | 4-Stroke | 3819723 | Product category specified in source |
Technical Specs
- Product Type
- Rubber Packing Box / Stuffing Box / Sealing Sleeve Kit
- Installation
- Marine Propulsion Propeller Shaft
- Shaft Diameter
- 50mm
- Exterior Sleeve Diameter
- 70mm (Tolerance +0.5/-0.3 mm)
- Housing Material
- Molded Rubber
- Dimensions
- A: 36mm, B: 92mm
- Product Dimensions
- Height: 13.0cm; Width: 11.0cm; Length: 11.0cm
- Weight
- 0.6 kg (1.29 lbs)
- Maximum Bearing Distance
- 1500 mm
- Maintenance Interval
- Every 200 hours or once per year (grease)
- Included Components
- Installation tools and grease tube
- Other Technical Attributes
- Water-lubricated packing box for effective sealing at all speeds
What’s in the Box
- 1 x Sealing Sleeve Kit (3819723)
Installation Notes
- Ensure the vessel is safely out of the water and the engine is off.
- Disconnect the propeller shaft from the transmission coupling.
- Remove the old shaft seal assembly from the stern tube.
- Thoroughly clean the propeller shaft and the inside of the stern tube, removing any debris or corrosion.
- Lubricate the new seal and the shaft with the included grease.
- Slide the new sealing sleeve kit onto the shaft and press it firmly into the stern tube.
- Ensure the seal is correctly seated and secured according to the included instructions.
- Reconnect the propeller shaft to the transmission, checking for proper alignment.
- After launching the vessel, bleed any trapped air from the seal as per the instructions.
- Check for leaks with the shaft stationary and while turning under load.
Troubleshooting & FAQ
How do I know if this packing box fits my shaft?
This seal is designed specifically for 50mm propeller shafts that fit into a 70mm stern tube sleeve. Always measure your shaft and sleeve diameters before ordering to ensure compatibility.
What are the signs of a failing shaft seal?
Common signs include excessive dripping when the shaft is stationary, a steady stream of water while the shaft is turning, an unexplained increase in bilge water, or visible cracks and deterioration of the rubber housing.
How often does this seal need maintenance?
The recommended maintenance interval is to apply grease every 200 operating hours or at least once per year, whichever comes first, to keep it lubricated and functioning correctly.
Is any water leakage normal with this seal?
A properly installed and maintained seal should be virtually dripless. While a very occasional drop of water might occur, a constant drip or stream indicates a problem that needs attention.
What is the maximum distance allowed between shaft bearings?
The maximum supported distance between shaft bearings when using this seal is 1500 mm. Exceeding this can lead to excessive shaft vibration and premature seal failure.
Can I install this myself?
While installation is possible for those with strong mechanical skills, professional installation is recommended. Proper fit, alignment, and air-bleeding are critical for safety and performance.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
This product is 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 for unused items 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
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