Aftermarket Power Steering Pump Pulley for Volvo Penta, OMC, Johnson/Evinrude & MerCruiser Stern Drives
Aftermarket Power Steering Pump Pulley for Volvo Penta, OMC, Johnson/Evinrude & MerCruiser Stern Drives is backordered and will ship as soon as it is back in stock.
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Aftermarket Power Steering Pump Pulley for Volvo Penta, OMC, Johnso...
Aftermarket Power Steering Pump Pulley for Volvo Penta, OMC, Johnson/Evinrude & MerCruiser Stern Drives is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket power steering pump pulley is designed for selected Volvo Penta, OMC, Johnson/Evinrude, and MerCruiser stern-drive applications. It is listed for Volvo Penta and OMC/Johnson/Evinrude servo-pump applications and for MerCruiser power steering pump applications. Confirm the original pulley, engine configuration, and reference number before ordering.
For Volvo Penta applications, this pulley is listed as a replacement for OEM part 3853804 and as an equivalent to Sierra 18-8964. Additional listed references include OMC/Johnson/Evinrude numbers 0983839, 983839, 0983734, 983734, 0909981, and 909981. For MerCruiser applications, the listed OEM references are 73873A1 and 73873, with aftermarket reference 18-8227.
- Power steering pump pulley for marine stern-drive systems.
- Aftermarket replacement for the reference numbers listed below.
- Sold as one pulley; no additional components are listed as included.
Part Number Matrix
The following references are listed for this pulley. A number appearing in the same product record does not by itself confirm fitment for every engine; verify the reference against your original part and application.
| Brand or Source | Part Number | Reference Type |
|---|---|---|
| Volvo Penta | 3853804 | OEM reference |
| OMC/Johnson/Evinrude | 0983839 / 983839 | OEM references |
| OMC/Johnson/Evinrude | 0983734 / 983734 | OEM references |
| OMC/Johnson/Evinrude | 0909981 / 909981 | OEM references |
| Sierra | 18-8964 | Aftermarket reference for 3853804 |
| MerCruiser | 73873A1 / 73873 | OEM references |
| Aftermarket reference | 18-8227 | MerCruiser application reference |
Engine & Model Compatibility
This pulley is associated with the following marine stern-drive application groups:
| Brand | Application | Reference Numbers | Fitment Notes |
|---|---|---|---|
| Volvo Penta | Stern-drive / out-drive power steering or servo-pump applications | 3853804; 18-8964 | The Sierra catalog describes 18-8964 as a power steering pump pulley replacing 3853804 and notes many Volvo sterndrive applications. |
| OMC | Cobra stern-drive / out-drive power steering pump applications | 0983839 / 983839; 0983734 / 983734; 0909981 / 909981 | Confirm the original pulley and reference number for the specific Cobra installation. |
| Johnson/Evinrude | Marine stern-drive / servo-pump applications | 0983839 / 983839; 0983734 / 983734; 0909981 / 909981 | Verify the application and original part number before installation. |
| MerCruiser | Stern-drive power steering pump applications | 73873A1 / 73873; 18-8227 | Use the MerCruiser reference and the original pulley for application confirmation. |
Specific model-year, horsepower, belt, shaft, and serial-number coverage is not established by the available product record. Do not rely on a general engine-size range alone to confirm fitment.
Technical Specs
- Product Type
- Power steering pump pulley
- Application
- Marine stern-drive or out-drive power steering/servo-pump systems
- Product Configuration
- Single replacement pulley; not listed as a kit
- Volvo Penta Reference
- 3853804
- MerCruiser References
- 73873A1 and 73873
- Aftermarket References
- 18-8964 and 18-8227
- Material
- Not specified in the product record
What’s in the Box
- 1 x Power steering pump pulley
No belt, pump, mounting hardware, key, or other accessories are listed as included.
Installation Notes
- Disconnect the battery and allow the engine to cool before beginning work.
- Identify the existing power steering pump pulley and compare its shape, belt interface, mounting arrangement, and reference number with the replacement.
- Follow the service instructions for your exact engine and stern-drive configuration.
- Release drive-belt tension using the procedure and tools specified by the engine manufacturer.
- Remove the belt and existing pulley with the correct pulley-removal equipment; do not pry against the pump or damage the shaft.
- Inspect the pump shaft, keyway, mounting surface, and belt for wear or damage before installing the replacement.
- Install the pulley in the correct orientation and ensure it is fully seated and aligned with the belt system.
- Use the manufacturer-specified fastener and pulley torque values for your exact application. No universal torque value is provided with this listing.
- Route and tension the belt according to the engine service manual.
- Reconnect the battery, start the engine only after all tools are clear, and check pulley alignment, belt tracking, steering operation, and abnormal noise.
Troubleshooting & FAQ
What does this product replace?
The product record lists Volvo Penta 3853804, OMC/Johnson/Evinrude 0983839, 983839, 0983734, 983734, 0909981, and 909981, plus MerCruiser 73873A1 and 73873. Aftermarket references listed are Sierra 18-8964 and 18-8227. Verify the correct reference for your application before ordering.
Will it fit every Volvo Penta, OMC, Johnson/Evinrude, or MerCruiser stern drive?
No universal fitment should be assumed. The product is associated with the application groups listed on this page, but exact fitment can vary by model, year, belt system, pump configuration, and serial number. Compare the original pulley and part number with the applicable service information.
Is this a complete power steering pump?
No. This listing is for one power steering pump pulley only. The pump, belt, mounting hardware, key, and other components are not listed as included.
What tools are required for installation?
Tools vary by engine and pump configuration. A basic socket and wrench set, a suitable belt-tension tool, and a pulley puller or installer may be required. Consult the service manual for your exact application.
Are the belt type and pulley dimensions provided?
The available product record does not specify pulley dimensions, belt profile, or other detailed measurements. Compare the replacement with the original pulley before installation.
What are common signs of a pulley problem?
Possible signs include pulley wobble, visible damage, belt misalignment, belt squeal, uneven belt wear, or abnormal noise from the pump-drive area. Inspect the pump, shaft, belt, and related components before replacing the pulley.
Is this an OEM part?
This is an aftermarket replacement pulley. The OEM and aftermarket numbers shown on this page are reference numbers used for identification and fitment checking; the product is not represented as a genuine OEM component.
What warranty applies?
Warranty terms, if applicable, are governed by the seller’s current warranty and return policy. Review those terms before purchase.
Safety & Important Information
- Verify the original pulley, reference number, belt interface, and mounting arrangement before purchase.
- Keep the Volvo Penta, OMC, Johnson/Evinrude, and MerCruiser application groups separate when checking fitment; a reference number for one application does not automatically confirm another.
- Do not use a pulley that is cracked, bent, misaligned, or incompatible with the belt system.
- Use the service manual for your exact engine and stern-drive configuration for torque, belt tension, and installation procedures.
- Professional installation is recommended when the correct pulley-removal or installation procedure is uncertain.
About Sea Sierra
- Marine replacement parts selected for stern-drive and out-drive service applications.
- Reference-number support to help customers compare replacement components with their original parts.
- Product information presented with application-specific fitment guidance for safer ordering and installation.
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