Impeller Repair Kit – Fits Volvo Penta 3.0-8.1L Gas Engines (Replaces 21213664, 3584350, 3588914)
Impeller Repair Kit – Fits Volvo Penta 3.0-8.1L Gas Engines (Replaces 21213664, 3584350, 3588914) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Impeller Repair Kit – Fits Volvo Penta 3.0-8.1L Gas Engines (Replac...
Product Details
This Impeller Repair Kit – Fits Volvo Penta 3.0-8.1L Gas Engines is designed for maintaining the sea water pump on a wide range of Volvo Penta V6 and V8 stern drive and inboard gas engines, including 3.0L, 4.3L, 5.0L, 5.7L, and 8.1L models. It ensures your engine’s cooling system operates efficiently by replacing a worn or damaged impeller.
It serves as a direct replacement for Volvo Penta (21213664, 3584350, 3588914), Johnson (09-812B), Jabsco (13554-0001), and others, providing a reliable interchange for multiple OEM and aftermarket part numbers.
- Installs via a simple spline drive mechanism.
- Constructed with a durable neoprene rubber impeller and a brass hub for corrosion resistance.
- Includes essential impeller, O-ring, and gasket for a complete service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 21213664 |
| Volvo Penta | 3584350 |
| Volvo Penta | 3588914 |
| Volvo Penta | 3841696 |
| Volvo Penta | 3842786 |
| Volvo Penta | 21951354 |
| Johnson | 09-812B |
| Johnson | 09-812B-1 |
| Jabsco | 13554-0001 |
| Yamaha | 6TA-12457-00 |
| Sierra | 18-3306 |
| Indmar | S685007 |
| Yanmar | 119773-42600 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is verified for Volvo Penta raw water pumps used on the specified gas engine models.
It also fits select Indmar Monsoon engines as indicated.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Volvo Penta | 3.0GL, 3.0GS | 130-140 | 4-Stroke | 21213664, 3584350 | Raw water pump |
| Volvo Penta | 4.3GL, 4.3GS, 4.3GXi | 180-225 | 4-Stroke | 21213664, 3588914 | Raw water pump |
| Volvo Penta | 5.0GL, 5.0GXi | 220-270 | 4-Stroke | 21213664, 3588914 | Raw water pump |
| Volvo Penta | 5.7GL, 5.7GS, 5.7GXi | 250-320 | 4-Stroke | 21213664, 3588914 | Raw water pump |
| Volvo Penta | 8.1Gi, 8.1GXi | 375-420 | 4-Stroke | 21213664, 3588914 | Raw water pump |
| Indmar | Monsoon | 320-350 | 4-Stroke | S685007 | Fits 320HP, 325HP, 330HP, 335HP, 340HP & 350HP models |
Technical Specs
- Product Type
- Sea Water Pump Impeller Kit
- Installation
- Spline Drive
- Housing Material
- Brass Hub
- Impeller Material
- Neoprene Rubber
- Dimensions
- 57mm OD × 48.3mm Width (2-1/4" × 1-15/16")
- Number of Blades
- 12
- Center Bore
- 14.5mm
- Package Contents
- Impeller, O-Ring, Gasket
- Color
- Black
What’s in the Box
- 1 x Impeller (Neoprene + Brass Hub) (Replaces 21213664)
- 1 x O-Ring
- 1 x Gasket
Installation Notes
- Close the seacock/water intake valve before starting.
- Access the sea water pump and remove the cover plate screws.
- Use pliers or an impeller puller to remove the old impeller. Note the direction of the vanes.
- Clean any debris from the pump housing and inspect for scoring or damage.
- Lightly lubricate the new impeller and the inside of the pump housing with a suitable marine lubricant.
- Insert the new impeller, bending the vanes in the same direction as the original.
- Install the new gasket and/or O-ring on the cover plate.
- Re-secure the cover plate, tightening screws in a star pattern.
- Open the seacock, start the engine, and immediately check for leaks and proper water flow.
Troubleshooting & FAQ
How do I know if this impeller fits my specific engine?
First, check the Engine Compatibility table on this page. Second, cross-reference your existing part number with our Part Number Matrix. If your engine model and part number match, it is a confirmed fit. Always visually compare our product photos with your old part before ordering.
What are the signs of a failing water pump impeller?
Common signs include engine overheating at idle or low speeds, a reduced stream of water from the exhaust, or visible cracks and missing blades on the impeller itself during inspection. A dry, cracked, or stiff impeller should be replaced immediately.
How often should I replace my engine's impeller?
As a general rule, impellers should be inspected annually and replaced every one to two years, or every 200-300 hours of operation, whichever comes first. Usage in sandy or silty water may require more frequent changes.
What kind of lubricant should I use for installation?
Use a water-based marine lubricant or a small amount of dish soap. Do not use petroleum-based grease, as it can cause the neoprene rubber to degrade over time.
The fitment list is broad. Are there any known exceptions?
While this kit is designed to fit all listed models, manufacturing variations in older engines can occasionally cause issues. Some user feedback indicates that minor fitment adjustments are rarely needed. We recommend carefully checking the dimensions (57mm OD x 48.3mm Width) against your original impeller if you have any doubts.
Why choose an aftermarket part over OEM?
This listing is an aftermarket replacement part, not OEM. It is built to meet or exceed OEM-level specifications with comparable materials and performance. Our parts are manufactured in an ISO 9002 certified facility and are batch-inspected to ensure quality and consistency, offering a great value without compromising on reliability.
What are the shipping speed and cost?
We ship worldwide quickly, with a typical transit time of 5–15 days for most regions. Standard shipping is free. Expedited shipping options, where available, will be presented at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. See our official 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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