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

This impeller repair kit is designed for a wide range of Volvo Penta gas engines, including 3.0L, 4.3L, 5.0L, 5.7L, and 8.1L V6 and V8 stern drive and inboard models. It serves as a direct replacement component for maintaining your engine's cooling system.

This kit replaces multiple OEM and aftermarket part numbers, including Volvo Penta 21213664, 3584350, 3588914, 3841696, 3842786, and 21951354; Johnson 09-812B and 09-812B-1; Jabsco 13554-0001; Sierra 18-3306; Indmar S685007; Yanmar 119773-42600; and Yamaha 6TA-12457-00.

• Installation Method: Spline Drive
• Core Materials: Features a durable neoprene rubber impeller with a brass hub for corrosion resistance.
• Complete Kit: Includes one impeller, one O-ring, and one gasket for a full replacement.

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.

Technical Specifications

Package Contents

• 1 x Impeller (Neoprene + Brass Hub) (Replaces 21213664)
• 1 x O-Ring
• 1 x Gasket

Installation Guide

1. Turn off the engine and close the raw water intake valve (seacock).
2. Locate the sea water pump and remove the screws from the end cover plate.
3. Carefully remove the cover and the old O-ring or gasket. Note the rotational direction of the old impeller's blades.
4. Use needle-nose pliers or an impeller puller to remove the old impeller from the housing.
5. Clean any debris or corrosion from the inside of the pump housing and the cover plate.
6. Place the new gasket or O-ring onto the pump housing.
7. Lubricate the new impeller with a small amount of water-resistant grease or soap.
8. Insert the new impeller into the housing, rotating the driveshaft to align the spline. Bend the blades in the same direction as the old impeller.
9. Reinstall the cover plate and tighten the screws in an even, crisscross pattern.
10. Open the seacock, start the engine, and immediately check for adequate water flow and any leaks around the pump cover.

Troubleshooting & FAQ

Q: How do I confirm this impeller kit fits my Volvo Penta engine?
A: This kit is designed for Volvo Penta 3.0L to 8.1L gas engines. To ensure a perfect match, please compare your existing impeller's part number to our cross-reference list, which includes Volvo Penta numbers like 21213664, 3584350, and 3588914. Also, check the compatible models table and verify the dimensions (57mm OD × 48.3mm Width).

Q: What are the signs that my impeller needs to be replaced?
A: Common signs of a failing impeller include the engine running hotter than normal, a noticeable reduction in water flow from the exhaust, and visible damage like cracks, missing blades, or stiff rubber on the impeller itself.

Q: How often should I replace my engine's water pump impeller?
A: For preventative maintenance, it is recommended to inspect your impeller annually and replace it every 1-2 years. Replacement frequency depends on usage hours and operating conditions (e.g., saltwater accelerates wear compared to freshwater).

Q: I saw a review mentioning fitment issues. Is this a common problem?
A: We are aware of reports regarding fitment. Such issues can arise from variations in pump housings across engine model years. We strongly recommend verifying the impeller dimensions (57mm OD × 48.3mm Width) and cross-referencing part numbers before ordering to guarantee compatibility.

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.