Impeller Kit – Fits Volvo Penta Marine Engines (Replaces 21951346, 3586494)
Impeller Kit – Fits Volvo Penta Marine Engines (Replaces 21951346, 3586494) 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 Kit – Fits Volvo Penta Marine Engines (Replaces 21951346, ...
Product Details
This aftermarket Impeller Kit – Fits Volvo Penta Marine Engines (Replaces 21951346, 3586494) is engineered for Volvo Penta D1 and D2 series marine diesel engines from 13 to 75 HP, manufactured in 2003 and later. It serves as a vital component of the raw water cooling system, ensuring optimal engine temperature and performance.
It is a direct replacement for Volvo Penta part numbers 21951346 and 3586494.
- Designed for straightforward, direct replacement installation.
- Used in raw water (sea water) engine cooling systems.
- Kit includes the impeller and a new O-ring/gasket for a complete service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 21951346 |
| Volvo Penta | 3586494 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This impeller kit is designed exclusively for the Volvo Penta D1 and D2 series engines listed.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | D1-13 | 13 | 4-Stroke | 2003–and later | 21951346/3586494 | |
| Volvo Penta | D1-20 | 20 | 4-Stroke | 2003–and later | 21951346/3586494 | |
| Volvo Penta | D1-30 | 30 | 4-Stroke | 2003–and later | 21951346/3586494 | |
| Volvo Penta | D2-40 | 40 | 4-Stroke | 2003–and later | 21951346/3586494 | |
| Volvo Penta | D2-50 | 50 | 4-Stroke | 2003–and later | 21951346/3586494 | |
| Volvo Penta | D2-55 | 55 | 4-Stroke | 2003–and later | 21951346/3586494 | |
| Volvo Penta | D2-60 | 60 | 4-Stroke | 2003–and later | 21951346/3586494 | |
| Volvo Penta | D2-75 | 75 | 4-Stroke | 2003–and later | 21951346/3586494 |
Technical Specs
- Product Type
- Raw Water Pump Impeller Kit
- Installation
- Direct replacement
- Application
- For raw water/sea water cooling system
- Dimensions
- 13.0 x 13.0 x 13.0
What’s in the Box
- 1 x Impeller (Replaces 21951346/3586494)
- 1 x O-ring/Gasket (for impeller housing cover)
Installation Notes
- Close the raw water intake seacock.
- Place an absorbent pad under the raw water pump to catch any spillage.
- Remove the screws from the pump cover plate.
- Carefully pry off the cover. Note the orientation of the old impeller blades.
- Remove the old impeller using pliers or an impeller puller tool.
- Clean the inside of the pump housing and the cover plate.
- Lubricate the new impeller and the housing interior with a suitable marine grease or soap.
- Install the new impeller, bending the blades in the same direction as the old one.
- Replace the cover O-ring/gasket and reinstall the cover plate.
- 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 engine?
This kit is specifically for Volvo Penta D1 and D2 series engines (13–75 HP) from 2003 onwards. The most reliable way to confirm fitment is to cross-reference your existing part number with the ones listed: 21951346 or 3586494. Also, check the compatibility table on this page.
What are the signs of a failing impeller?
Common signs include engine overheating alarms, reduced water flow from the exhaust, and visible cracks or missing blades on the impeller itself during inspection. A worn or damaged impeller cannot pump water efficiently, leading to poor cooling.
How often should I replace the raw water pump impeller?
As a preventative maintenance item, it is recommended to inspect the impeller annually and replace it every 1-2 years, or after every 200-300 hours of engine use, depending on operating conditions. Running the pump dry, even for a few seconds, can severely damage the impeller.
Can I install this impeller myself?
Yes, replacing an impeller is a common maintenance task for many boat owners. However, it requires basic mechanical aptitude and the correct tools. Follow the generic steps provided or refer to your specific engine service manual. If you are not confident, we recommend professional installation.
What is the difference between this and the OEM part?
Our aftermarket parts are designed and manufactured to meet or exceed OEM specifications for fit, form, and function. They are made from high-quality materials in a certified facility but are available at a more competitive price point without the OEM brand markup.
Is grease or lubricant included in the kit?
This kit includes the core components (impeller and O-ring). Lubricant/grease is not included and must be purchased separately. Using an appropriate marine-grade lubricant during installation is critical for performance and longevity.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our 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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