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Marine V-Belt for Volvo Penta 4.3L and 5.0L Engines & OMC Cobra Stern/Out Drives – Replaces 3889124, 3817287

Regular price $35.75

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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.


Tracking information will be provided once your order ships.

If you have any questions, feel free to email us at info@seasierra.com, and we’ll get back to you within 20–36 hours.

Product Details

This single replacement Marine V-Belt is listed for Volvo Penta 4.3L and 5.0L marine engine applications, as well as OMC Cobra stern/out-drive applications. It is intended for replacement of a worn or damaged belt in a compatible V-belt drive system.

The belt is associated with Volvo Penta reference numbers 3889124 and 3817287. Confirm the belt profile, routing, and reference number against your original belt and engine or drive documentation before ordering.

  • Single replacement marine V-belt.
  • Listed for Volvo Penta 4.3L and 5.0L applications.
  • Also listed for OMC Cobra stern/out-drive applications.
  • Designed as an aftermarket replacement for compatible belt applications.

Part Number Matrix

Use the following references when comparing the replacement belt with your existing part.

Brand or Reference Part Number Notes
Volvo Penta 3889124 Reference number listed for this replacement belt
Volvo Penta 3817287 Additional reference number listed for this replacement belt

Engine & Application Compatibility

The company application data lists this belt for Volvo Penta 4.3L and 5.0L V-belt applications and OMC Cobra stern/out-drive applications. The available data does not establish a complete model-year, serial-number, or individual engine-model list.

Brand or Application Engine or Drive Description Belt Type Reference Numbers Fitment Note
Volvo Penta 4.3L marine engine applications V-belt 3889124, 3817287 Verify the original belt and application details
Volvo Penta 5.0L marine engine applications V-belt 3889124, 3817287 Verify the original belt and application details
OMC Cobra Stern/out-drive applications V-belt 3889124, 3817287 Confirm the specific drive application before purchase

Technical Specs

Product Type
Marine V-belt
Application
Volvo Penta 4.3L and 5.0L applications; OMC Cobra stern/out-drive applications
Reference Numbers
3889124 and 3817287
Product Configuration
Single replacement belt; not a kit
Brand Status
Aftermarket replacement

What’s in the Box

  • 1 x Marine V-belt

Installation Notes

  1. Stop the engine, allow it to cool, and disconnect the battery according to the manufacturer's safety procedure.
  2. Before removal, note or photograph the belt routing and identify the belt tensioning arrangement.
  3. Release the belt tension using the correct tool for the engine or stern/out-drive system, then remove the old belt.
  4. Inspect pulleys, tensioning components, and related drive components for wear, misalignment, corrosion, or damage.
  5. Compare the replacement belt with the original for profile and overall application before installation.
  6. Install the belt following the manufacturer's routing instructions, ensuring it is fully seated in every pulley groove.
  7. Apply the specified tension for the particular engine or drive system. Do not rely on a generic tension value.
  8. Rotate the system by hand where appropriate and recheck alignment before starting the engine.
  9. After installation, check for abnormal noise, belt wandering, or slippage during a brief test run.

Troubleshooting & FAQ

How can I confirm this belt fits my application?

Compare your original belt, the belt profile, and the reference numbers 3889124 or 3817287 with the information in this listing. Confirm the specific Volvo Penta 4.3L or 5.0L application, or OMC Cobra stern/out-drive application, in the applicable service documentation before ordering.

Is this a serpentine belt?

No. The company application data identifies this product as a V-belt. Do not substitute it for a serpentine belt unless the manufacturer's documentation specifically confirms the application.

What are common signs of a worn V-belt?

Inspect for cracking, glazing, frayed edges, excessive wear, looseness, or visible damage. Squealing, slippage, or irregular belt movement can also indicate a belt or pulley problem. Investigate the cause before installing a replacement.

Does this listing include multiple belts or installation hardware?

No. This listing is for one replacement V-belt only. It does not include pulleys, tensioners, fasteners, or other installation hardware.

Is this an OEM belt?

This is an aftermarket replacement. The Volvo Penta numbers shown are reference numbers for application comparison and should be verified against your original part and engine or drive documentation.

What if my model is not listed?

Do not assume compatibility from engine displacement alone. Check the original belt and the manufacturer's parts or service documentation for the exact application, belt profile, and reference number.

Warranty and returns?

Returns and warranty coverage are subject to the applicable store policy. Contact support with your order details before returning a part, and keep the belt unused and in its original condition when possible.

Safety & Important Info

  • Verify the belt profile, routing, dimensions, and reference number against your original part before purchase.
  • Engine displacement alone does not confirm fitment; application details can vary by engine and drive configuration.
  • This is an aftermarket replacement, not an OEM component.
  • Disconnect the battery and follow the engine or drive manufacturer's safety and installation procedures.
  • Professional installation is recommended when belt routing, tensioning, or application identification is uncertain.

About Sea Sierra

  • Marine Parts Support — We provide replacement parts for marine engine and drive maintenance applications.
  • Application-Focused Listings — Product information is organized around reference numbers and documented marine applications.
  • Replacement Value — Aftermarket alternatives help support routine service and repair needs when the application is properly verified.

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