Impeller Kit – Fits Volvo Penta 3.0-8.1L V6/V8 (Replaces 21951348, 21213660)

$19.50

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

Free standard shipping on all orders under 1 KG

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

Product Details

This Impeller Kit – Fits Volvo Penta 3.0-8.1L V6/V8 Engines (Replaces 21951348, 21213660) is designed for a wide range of Volvo Penta V6 and V8 gasoline engines, primarily those manufactured between 1999 and 2005 using a crank-mounted sea water pump. It provides a reliable solution for maintaining your engine's cooling system.

It serves as a direct replacement for Volvo Penta part numbers 21951348, 21213660, 3856039, 875811, and Sierra 18-3277, among others. Use our extensive cross-reference tables to confirm compatibility.

Engine Application: Fits Volvo Penta 3.0L, 4.3L, 5.0L, 5.7L, & 8.1L models.
Installation Location: Designed for crank-driven sea water pumps.
Core Components: Kit includes a neoprene impeller, stop lug, and o-ring for a complete service.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.

Brand	Part Number
Volvo Penta	21951348
Volvo Penta	21213660
Volvo Penta	806590
Volvo Penta	876243
Volvo Penta	3855546
Volvo Penta	860203
Volvo Penta	6605343
Volvo Penta	3856039-7 / 3856039
Volvo Penta	875811-2 / 875811
Volvo Penta	3858256
Volvo Penta	3850107
Volvo Penta	3862281
Volvo Penta	3862567
Volvo Penta	21213650
Sierra	18-3277
Sierra	18-3081

Engine & Model Compatibility

Confirm your engine model and year in the tables below to ensure proper fitment.

This impeller is specifically for Volvo Penta gasoline engines from 1999–2005 that use a sea water pump mounted directly on the crankshaft.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Volvo Penta	3.0L	130–140	4-Stroke	1999–2005	21951348	Crank-driven sea water pumps
Volvo Penta	4.3L	180–225	4-Stroke	1999–2005	21951348	Crank-driven sea water pumps
Volvo Penta	5.0L	200–270	4-Stroke	1999–2005	21951348	Crank-driven sea water pumps
Volvo Penta	5.7L	250–320	4-Stroke	1999–2005	21951348	Crank-driven sea water pumps
Volvo Penta	8.1L	375–420	4-Stroke	1999–2005	21951348	Crank-driven sea water pumps

Pump Number	Brand	Years	Notes
3812693	Volvo Penta	1999–2005	Crank-driven sea water pump
3812695	Volvo Penta	1999–2005	Crank-driven sea water pump
3812696	Volvo Penta	1999–2005	Crank-driven sea water pump
3812697	Volvo Penta	1999–2005	Crank-driven sea water pump
3857202	Volvo Penta	1999–2005	Crank-driven sea water pump
3858229	Volvo Penta	1999–2005	Crank-driven sea water pump
3860795	Volvo Penta	1999–2005	Crank-driven sea water pump
3862482	Volvo Penta	1999–2005	Crank-driven sea water pump
3862484	Volvo Penta	1999–2005	Crank-driven sea water pump
3862485	Volvo Penta	1999–2005	Crank-driven sea water pump
3862487	Volvo Penta	1999–2005	Crank-driven sea water pump
21214595	Volvo Penta	1999–2005	Crank-driven sea water pump
21214596	Volvo Penta	1999–2005	Crank-driven sea water pump
21214599	Volvo Penta	1999–2005	Crank-driven sea water pump
21214601	Volvo Penta	1999–2005	Crank-driven sea water pump

Technical Specs

Product Type: Impeller Repair Kit with Stop Lug
Installation: Crank-driven sea water pump
Dimensions: Impeller Width: 31.5mm (1-1/4"), Diameter: 57mm (2-1/4"), Shaft: 16mm (5/8")
Fitting Type: 12 Spline
Impeller Material: Neoprene
Blades: 12
Warranty: 1 year (varies by manufacturer)

What’s in the Box

1 x Impeller (Replaces 21213660/21951348)
1 x Stop Lug (Replaces 3857954)
1 x O-Ring

Installation Notes

Close the engine's raw water intake seacock.
Locate the sea water pump, typically mounted on the engine's crankshaft pulley.
Remove the screws securing the pump's end cover.
Carefully pry out the old impeller using pliers or impeller pullers. Note the rotational direction of the blades.
Clean any debris or old gasket material from the pump housing and end cover.
Lightly lubricate the inside of the housing and the new impeller with water-resistant grease or soap.
Install the new impeller, bending the blades in the correct rotational direction as you insert it.
Place the new o-ring or gasket onto the pump housing.
Reinstall the end cover and tighten the screws evenly.
Open the seacock before starting the engine.
Start the engine and immediately check for proper water flow and for any leaks around the pump cover.

Troubleshooting & FAQ

How do I know if this impeller fits my Volvo Penta engine?

This kit is for Volvo Penta gas engines (3.0L-8.1L) from approximately 1999 to 2005 with a crankshaft-mounted raw water pump. The most reliable method is to match your existing part number to those in our Part Number Matrix or to your pump model number in the compatibility table.

What are the signs of a failing impeller?

Common signs include engine overheating at idle or low speeds, reduced water flow from the exhaust, cracked or missing impeller blades upon inspection, and a leaking pump housing.

How often should I replace my engine's impeller?

As a preventative measure, most marine technicians recommend replacing the impeller every 1-2 years or every 100-200 hours of engine use, whichever comes first. This interval may be shorter if you operate in sandy or debris-heavy water.

Why are there different year ranges like "prior to 2005" vs. "through 2005"?

Volvo Penta made a design change around 2005. Some models in 2005 may use a different pump and impeller. This kit fits the earlier style common from 1999-2005. Always verify your pump number; if in doubt, check your original part before ordering.

What is the stop lug used for?

The included stop lug is a small but critical component that prevents the impeller from spinning on the pump shaft in certain pump designs. Not all pump versions require it, but it should be used if your original setup included one.

My engine still overheats after replacing the impeller. What else could be wrong?

If overheating persists, check for other blockages in the cooling system, such as clogged intake strainers, heat exchangers, or exhaust manifolds. Also, verify the thermostat is functioning correctly and a proper amount of coolant is in the closed-cooling side, if applicable.

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 and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement part, not an OEM component. Brand names and part numbers are used for reference purposes only.
Professional installation is recommended for safety and performance. Improper installation can lead to engine damage.

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, getting you back on the water faster.
Manufacturer-Direct Value — By working directly with manufacturers, we offer fair pricing without compromising on materials or quality control.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.