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

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

This impeller kit is designed for a wide range of Volvo Penta 3.0L, 4.3L, 5.0L, 5.7L, and 8.1L V6/V8 gasoline engines, primarily those manufactured between 1999 and 2005 with a crank-mounted sea water pump. It serves as a direct replacement for multiple OEM and aftermarket parts, ensuring broad compatibility for engine maintenance and repair.

This kit provides a direct replacement for Volvo Penta part numbers 21951348, 21213660, 806590, 876243, 3855546, 860203, 6605343, 3856039-7, 3856039, 875811-2, 875811, 3858256, 3850107, 3862281, 3862567, 21213650, and Sierra 18-3277/18-3081.

• Complete Kit: Includes a high-durability neoprene impeller, O-ring, and stop lug for a full-service replacement.
• Specific Fitment: Engineered for crank-driven sea water pumps on specified Volvo Penta models.
• Durable Material: The impeller features 12 blades made from a robust neoprene compound for reliable performance and longevity.

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 Pump Models

Technical Specifications

Package Contents

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

Installation Guide

1. Stop Water Inflow: Close the seacock to prevent water from entering the system.
2. Access the Pump: Locate the sea water pump, which is mounted on the engine's crankshaft.
3. Remove Hoses: Loosen the hose clamps and carefully detach the inlet and outlet hoses from the pump.
4. Open the Housing: Unscrew and remove the pump's cover plate. Take note of any gaskets or O-rings.
5. Extract Old Impeller: Use impeller pullers or two pairs of pliers to carefully grip and pull the old impeller straight out of the housing. Note its blade orientation.
6. Inspect Housing: Clean the interior of the pump housing and the cover plate. Check for deep scoring, cracks, or corrosion.
7. Lubricate: Apply a light coating of water-resistant grease or liquid soap to the inside of the pump housing and the new impeller.
8. Insert New Impeller: Align the new impeller's spline with the shaft key and insert it, bending the blades in the direction of engine rotation.
9. Install New O-Ring: Place the new O-ring into the groove on the pump cover or housing.
10. Reassemble: Re-install the cover plate and tighten the screws evenly in a star pattern to ensure a proper seal.
11. Reconnect Hoses: Reattach the water hoses and securely tighten the clamps.
12. Test System: Open the seacock, start the engine, and immediately check for any water leaks and verify proper water discharge from the exhaust.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Volvo Penta engine?
A: This impeller is designed for Volvo Penta V6/V8 engines (3.0L, 4.3L, 5.0L, 5.7L, 8.1L) from approximately 1999-2005 that use a crank-driven sea water pump. Please verify your engine model and year against the "Compatible Engine Models" table. It is also crucial to match your existing part number with those in our "Part Number Cross-Reference" list.

Q: My engine is a 2005 model. How can I be sure this fits?
A: There is some industry variation for the 2005 model year, with some sources listing compatibility through 2005 and others as "prior to 2005." The most reliable way to confirm fitment is by checking your pump's part number against our "Compatible Pump Models" list or by matching your old impeller's part number to our cross-reference table.

Q: What are the signs that my impeller needs to be replaced?
A: Common indicators of a failing impeller include engine overheating at idle or low speeds, a reduced or intermittent stream of water from the exhaust, and visible cracks, stiffness, or missing blades during a visual inspection. We recommend inspecting the impeller annually or every 100 hours of use.

Q: OEM vs. Aftermarket?
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.