Belt Tensioner for Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L Marine Engines – Replaces 3885250, 3587858, 3587859 and 3861010
Belt Tensioner for Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L Marine Engines – Replaces 3885250, 3587858, 3587859 and 3861010 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
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Belt Tensioner for Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L Marine Eng...
Belt Tensioner for Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L Marine Engines – Replaces 3885250, 3587858, 3587859 and 3861010 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket belt tensioner assembly is designed for selected Volvo Penta marine engines using the applicable serpentine-belt tensioner arrangement. Catalog references identify applications in the Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L engine families.
Before ordering, compare the part number and tensioner arrangement on your engine with the references and application information below. Model-family listings alone do not confirm fitment for every engine configuration.
- Replacement belt tensioner assembly for selected Volvo Penta marine engines.
- Helps maintain correct tension in the serpentine belt system.
- Supplied as one individual tensioner assembly.
- Aftermarket replacement; not an original Volvo Penta component.
Part Number References
The following manufacturer part numbers are listed as applicable references for this tensioner assembly. Confirm the number on your original part before purchase.
| Manufacturer | Part Number | Reference Type |
|---|---|---|
| Volvo Penta | 3885250 | Primary catalog reference |
| Volvo Penta | 3587858 | Application reference |
| Volvo Penta | 3587859 | Application reference |
| Volvo Penta | 3861010 | Application reference |
Engine Compatibility
The catalog application references below are grouped by engine family. Check your exact model designation, belt routing and original tensioner before ordering.
| Brand | Engine Models Listed | Engine Family | System | Applicable Reference |
|---|---|---|---|---|
| Volvo Penta | 4.3 GL, 4.3 GXI, 4.3 GI, 4.3 OSI | 4.3L | Marine serpentine-belt system | 3885250 / 3587858 |
| Volvo Penta | 5.0 GXI, 5.0 GI, 5.0 OSI | 5.0L | Marine serpentine-belt system | 3885250 / 3587858 |
| Volvo Penta | 5.7 GI, 5.7 GXI, 5.7 OSI | 5.7L | Marine serpentine-belt system | 3885250 / 3587858 |
| Volvo Penta | 8.1 GI, 8.1 GXI, 8.1 IPSCE, 8.1 OSI | 8.1L | Marine serpentine-belt system | 3885250 / 3587859 / 3861010 |
Technical Specifications
- Product Type
- Serpentine belt tensioner assembly
- Product Configuration
- Single replacement assembly
- Application
- Selected Volvo Penta marine engines with the matching belt-tensioner arrangement
- Part Type
- Aftermarket replacement
What's in the Box
- 1 x Belt tensioner assembly
Installation Notes
- Disconnect the battery and allow the engine to cool before beginning work.
- Confirm that the replacement tensioner matches the original part and belt-routing arrangement.
- Use the appropriate serpentine-belt tool or breaker bar to release belt tension.
- Remove the belt from the tensioner and note its routing before disassembly.
- Remove the original tensioner and retain any hardware that must be reused, unless replacement hardware is specified by the service information.
- Clean the mounting surface and install the replacement tensioner in the original position.
- Tighten the mounting fasteners to the engine manufacturer's specified torque.
- Route the belt according to the engine service manual and slowly release the tensioner.
- Check that the belt is fully seated and aligned on every pulley before starting the engine.
- After startup, inspect belt tracking and listen for abnormal noise.
Troubleshooting & FAQ
How do I confirm fitment?
Match the exact number on your original tensioner with the listed references, then confirm the engine model and belt arrangement. The 4.3L, 5.0L, 5.7L and 8.1L engine families contain multiple configurations, so the model family alone is not sufficient.
What are common signs of a worn tensioner?
Possible symptoms include belt squealing or chirping, abnormal pulley noise, belt misalignment, uneven belt wear, visible wobble or excessive movement at the tensioner.
Is a special tool required?
A serpentine-belt tensioner tool or a suitable long-handled breaker bar is commonly used to release belt tension. Follow the procedures and safety requirements in your engine service manual.
Is this for a V-belt system?
No. This listing is for the matching serpentine-belt tensioner arrangement. It should not be used on an engine equipped with a different V-belt or accessory-drive configuration.
Is this an OEM part?
No. This is an aftermarket replacement assembly intended for applications using the listed references. It is not manufactured or sold as an original Volvo Penta component.
What should I do if my engine model is not listed?
Do not assume compatibility from engine displacement alone. Compare the original part number, mounting arrangement and belt routing, or contact the seller with the complete engine model and original tensioner information before ordering.
Safety & Important Information
- Verify the original part number, mounting configuration and belt routing before purchase.
- Disconnect the battery and keep hands, clothing and tools away from moving belts and pulleys during testing.
- Use the manufacturer's torque specifications and service procedures.
- Professional installation is recommended if you are not familiar with marine engine accessory-drive service.
- This is an aftermarket replacement and is not an Original Equipment Manufacturer component.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket components for a wide range of marine service applications.
- Application-Focused Information — Check part numbers and complete engine details before ordering to help ensure the correct replacement.
- Customer Support — Contact us with your engine model and original part information if you need help confirming an application.
Payment & Security
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