Belt Idler Pulley for Volvo Penta D4-260, D4-300 and D6-350/D6-370/D6-400/D6-435 Engines — OEM 3847482
Belt Idler Pulley for Volvo Penta D4-260, D4-300 and D6-350/D6-370/D6-400/D6-435 Engines — OEM 3847482 is backordered and will ship as soon as it is back in stock.
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Belt Idler Pulley for Volvo Penta D4-260, D4-300 and D6-350/D6-370/...
Belt Idler Pulley for Volvo Penta D4-260, D4-300 and D6-350/D6-370/D6-400/D6-435 Engines — OEM 3847482 is backordered and will ship as soon as it is back in stock.
Product Details
This replacement belt idler pulley is designed for specified Volvo Penta stern-drive and outdrive applications using a metal roller belt. It is listed for D4-260 and D4-300 engines with serial numbers from 2004017298 and later, and D6-350, D6-370, D6-400 and D6-435 engines with serial numbers from 2006032252 and later.
This pulley corresponds to Volvo Penta OEM part number 3847482. Confirm both the engine model and the complete serial-number range before ordering.
- Replacement belt idler pulley for the listed Volvo Penta applications.
- Intended for use with the specified metal roller belt system.
- Single pulley supplied; this is not a multi-piece kit.
Part Number Matrix
Use the reference below to compare the pulley with the part being replaced.
| Brand | OEM Part Number |
|---|---|
| Volvo Penta | 3847482 |
Engine & Model Compatibility
The fitment below is limited to the listed models and serial-number conditions. Model family or horsepower alone is not sufficient to confirm compatibility.
| Brand | Engine Model | Rated HP | Application | Serial Number | OEM Part No. |
|---|---|---|---|---|---|
| Volvo Penta | D4-260 | 260 | Metal roller belt | 2004017298 and later | 3847482 |
| Volvo Penta | D4-300 | 300 | Metal roller belt | 2004017298 and later | 3847482 |
| Volvo Penta | D6-350 | 350 | Metal roller belt | 2006032252 and later | 3847482 |
| Volvo Penta | D6-370 | 370 | Metal roller belt | 2006032252 and later | 3847482 |
| Volvo Penta | D6-400 | 400 | Metal roller belt | 2006032252 and later | 3847482 |
| Volvo Penta | D6-435 | 435 | Metal roller belt | 2006032252 and later | 3847482 |
Technical Specifications
- Product Type
- Belt idler pulley
- Application
- Volvo Penta stern-drive and outdrive metal roller belt system
- OEM Part Number
- 3847482
- Quantity
- 1 pulley
What's in the Box
- 1 x Belt idler pulley
Installation Notes
- Disconnect the battery and allow the engine to cool completely before beginning work.
- Verify the engine model, complete serial number and existing pulley against the compatibility information on this page.
- Release belt tension according to the engine manufacturer's service procedure and remove the belt from the pulley.
- Remove the fastener securing the original pulley and inspect the mounting surface and fastener for damage or abnormal wear.
- Install the replacement pulley in the same orientation as the original component.
- Reinstall and correctly route the metal roller belt, then restore belt tension according to the engine manufacturer's specifications.
- Before operating the engine, confirm that the belt tracks correctly and that the pulley rotates freely without interference.
- After starting the engine, check for abnormal noise, vibration or belt misalignment. Stop the engine immediately if any problem is observed.
Troubleshooting & FAQ
How do I confirm that this pulley fits my engine?
Check the engine model and complete serial number. This listing is for Volvo Penta D4-260 and D4-300 engines from serial number 2004017298 onward, and D6-350, D6-370, D6-400 and D6-435 engines from serial number 2006032252 onward. Also compare the original pulley and OEM reference 3847482 before ordering.
What is the purpose of the idler pulley?
The idler pulley guides and supports the belt system at its designated mounting position. Correct alignment and belt tension are required for proper operation.
What are common signs of a worn pulley?
Possible signs include unusual squealing, chirping or grinding, pulley wobble, rough rotation, visible damage or abnormal belt wear. Inspect the pulley whenever the belt is serviced.
Does the package include the belt or mounting hardware?
No. The package contains one belt idler pulley only. The belt, fasteners and other components are not listed as included.
Can I install this pulley myself?
Installation requires correct belt removal, routing and tension adjustment. Use the applicable Volvo Penta service procedure and the manufacturer's torque specifications. Professional installation is recommended when the correct procedure or specifications are unavailable.
Safety & Important Information
- Verify the exact engine model and serial number before purchase.
- Do not rely on horsepower or engine-family information alone to confirm fitment.
- Compare the original component and OEM reference 3847482 before installation.
- Work only on a stopped, cooled engine with the battery disconnected.
- Use the manufacturer's service information for belt tension, fastener torque and final inspection.
About Sea Sierra
- Marine Parts Support — We provide replacement components for marine engine and stern-drive applications.
- Fitment-Focused Listings — Check model and serial-number conditions carefully before ordering.
- Practical Replacement Solutions — Supplied components are clearly identified by application and reference number.
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