Zinc Pencil Anode Kit – Fits Yanmar 4LHA, 6LP, 6LY Marine Engines (Replaces 119773-92600)

Zinc Pencil Anode Kit – Fits Yanmar 4LHA, 6LP, & 6LY Marine Engines

This aftermarket zinc pencil anode kit provides essential corrosion protection for specific Yanmar marine diesel engines. It is designed for 4LHA series (144–300 HP), 6LP series (315 HP), and 6LY series (all except 6LY3) engines equipped with heat exchangers, oil coolers, and intercoolers that require zinc anodes.

This kit is a direct replacement for Yanmar OEM part number 119773-92600 and individual components 119574-44150 (heat exchanger/oil cooler) and 119574-18790 (intercooler).

• Installation: Threaded pencil anodes screw directly into the engine's heat exchanger, oil cooler, and intercooler components.
• Material: Made from high-quality zinc for reliable sacrificial corrosion protection in saltwater environments.
• Kit Contents: Includes four heat exchanger/oil cooler anodes and one intercooler anode.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 4 x Heat Exchanger and Oil Cooler Zinc Anodes (Replaces Yanmar 119574-44150)
• 1 x Intercooler Zinc Anode (Replaces Yanmar 119574-18790)
• Note: Some Yanmar engines mated to a ZF transmission may require a fifth 119574-44150 anode for the transmission cooler. Please verify your specific configuration.

Installation Guide

1. Shut down the engine and allow it to cool completely before starting work.
2. Close the relevant seacocks to prevent water from entering the vessel.
3. Locate the existing pencil anodes on the heat exchanger, oil cooler, and intercooler housings.
4. Using the appropriate wrench (11/16" for the E-1F anodes), carefully unscrew the old anode plugs.
5. Inspect the condition of the removed anodes. They must be replaced if they are 50% or more eroded.
6. Clean the threads on the brass plug and inside the housing to ensure a good electrical connection and seal.
7. Install the new zinc anodes, screwing them in until they are snug. Do not overtighten.
8. Once all anodes are replaced, open the seacocks.
9. Start the engine and carefully inspect for any leaks around the newly installed anode plugs.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my Yanmar engine?

A: This kit is engineered for Yanmar's 4LHA, 6LP, and 6LY series engines (it does not fit the 6LY3 model). To ensure compatibility, please cross-reference your engine model with the "Compatible Engine Models" table on this page. This kit serves as a direct aftermarket replacement for OEM part number 119773-92600.

Q: How often should I replace these zinc anodes?

A: Regular inspection is key to engine health. We recommend checking your anodes every few months, and they should be replaced as soon as they show 50% erosion. This ensures your engine's cooling system components remain protected from galvanic corrosion.

Q: My engine setup seems to need an extra anode. Does this kit work?

A: Yes, this is a common configuration. Some Yanmar engines paired with a ZF transmission require an additional anode (our equivalent of Yanmar P/N 119574-44150) for the transmission cooler. This kit includes four of that specific anode. You may need to purchase one additional anode depending on your setup.

Q: What is the difference between the anodes included in this kit?

A: The kit contains two different anode types to service your engine. It includes four smaller anodes with 3/8" NPT threads for the heat exchanger and oil cooler, and one larger anode with a 1/2" NPT thread for the intercooler.

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.