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

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

This impeller repair kit provides the essential components needed to service and maintain the sea water pump on specific Volvo Penta engines. It is designed for 3.0L, 4.3L, 5.0L, 5.7L, and 8.1L gasoline engines from approximately 1999 to 2005 that are equipped with a crank-driven sea water pump.

This kit is a direct replacement for Volvo Penta part numbers 21951348 and 21213660, as well as Sierra part numbers 18-3276-1, 18-3277, and 18-3081.

• Restores cooling system performance by replacing the worn or damaged impeller.
• Engineered for crank-driven sea water pumps on specified Volvo Penta models.
• Kit includes a neoprene impeller, O-ring, and the necessary stop lug for a complete installation.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Compatible Sea Water Pumps: This kit is also confirmed to fit the following Volvo Penta sea water pump models: 3812693, 3812695, 3812696, 3812697, 3857202, 3858229, 3860795, 3862482, 3862484, 3862485, 3862487, 21214595, 21214596, 21214599, and 21214601.

Technical Specifications

Package Contents

• 1 x Impeller (Replaces 21951348)
• 1 x O-ring
• 1 x Stop Lug (Replaces 3857954)

Installation Guide

1. Close the seacock to shut off water flow to the engine.
2. Locate the sea water pump, which is mounted on the front of the engine's crankshaft.
3. Loosen the hose clamps and remove the inlet and outlet hoses from the pump.
4. Remove the screws holding the pump cover in place and carefully pry it off.
5. Use pliers or an impeller puller tool to remove the old impeller from the pump housing.
6. Clean the inside of the pump housing, ensuring no old impeller fragments remain.
7. Lubricate the new O-ring and place it in the groove on the pump body.
8. Fold the blades of the new impeller and insert it into the housing, rotating in the direction of engine operation.
9. Install the stop lug, ensuring it fits correctly between the two hose fittings on the pump's locating bar.
10. Reinstall the pump cover, tighten the screws, and reattach the hoses.
11. Open the seacock, start the engine, and check for proper water flow and leaks.

Troubleshooting & FAQ

Q: How do I know if this impeller kit will fit my Volvo Penta engine?

A: This kit is specifically for Volvo Penta 3.0L, 4.3L, 5.0L, 5.7L, and 8.1L engines manufactured between 1999 and 2005 that use a crank-driven sea water pump. To be certain, please verify that your engine falls within this range and check if your existing pump number is on our compatibility list. The kit replaces OEM part numbers 21951348 and 21213660.

Q: What are the common signs that my impeller needs to be replaced?

A: The most common indicators of a failing impeller are your engine running hotter than normal or a noticeable reduction in water pumping from the exhaust outlet. Upon inspection, you may find the impeller has visible cracks, stiff or broken blades, or has separated from its brass hub.

Q: How often should I replace my engine's impeller?

A: As a general rule for preventative maintenance, we recommend replacing your impeller every 1-2 boating seasons or every 100-200 hours of engine use. Regular inspection is key, especially if you operate in water with heavy sediment or saltwater.

Q: What is the stop lug for and is it required for installation?

A: Yes, the stop lug is a critical alignment part for specific Volvo Penta pump models. It is designed to fit between the two hose fittings on the pump's locating bar, ensuring the pump body is positioned correctly and securely. Do not omit this part if your pump requires it.

Q: Is this an OEM part or an aftermarket one?

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.