Zinc Pencil Anode for Volvo Penta Inboard Engines – Replaces 3838499, 800476, 804107, 838929, 858501

Product Details

This zinc pencil anode is an aftermarket replacement for Volvo Penta inboard marine engine applications. It is designed to provide sacrificial corrosion protection by gradually eroding in place, helping protect compatible metal components from galvanic corrosion in saltwater service.

The company catalog identifies this product as a single anode and lists aftermarket reference 18-6001. It replaces the following Volvo Penta references: 3838499, 800476, 804107, 838929, and 858501.

Zinc anodes are intended for saltwater applications. Always confirm the anode material, dimensions, thread, mounting location, and exact engine configuration against the original part or the applicable service documentation before installation.

• Single zinc pencil anode
• Aftermarket reference: 18-6001
• For compatible Volvo Penta inboard applications
• Designed to provide sacrificial corrosion protection in saltwater use

Part Number Matrix

Use the references below to compare the replacement with the part being removed. Part-number references do not replace confirmation of the exact application and mounting configuration.

Engine and Application Information

The company catalog identifies this item for Volvo Penta Inboard applications but does not provide a complete model, year, serial-number, shaft, or mounting-location range. Confirm your engine's exact configuration and compare the original anode before ordering.

The 2019 Sierra catalog identifies aftermarket reference 18-6001 as replacing Volvo Penta reference 838929 and identifies the product as a zinc anode. The catalog also states that zinc is for saltwater-only applications. Catalog model groupings should be treated as application leads unless they match the engine's complete service information.

Technical Specifications

Product type

Pencil anode

Material

Zinc

Application brand

Volvo Penta Inboard

Aftermarket reference

18-6001

Replaces

3838499, 800476, 804107, 838929, 858501

Water application

Saltwater applications

What's in the Box

• 1 × Zinc pencil anode

Installation Notes

1. Shut down the engine, allow it to cool, and follow the applicable service-manual safety procedures.
2. Locate the existing anode and verify that the replacement has the same physical form, mounting arrangement, and contact surface.
3. Remove the old anode using the correct tool. Do not force a seized fitting in a way that could damage the engine or heat-exchanger housing.
4. Clean corrosion and debris from the mounting area so the anode can make reliable metal-to-metal electrical contact.
5. Install the replacement according to the engine manufacturer's torque and sealing requirements. Do not apply paint or any insulating coating to the exposed zinc.
6. Inspect the installation for secure seating and leaks before returning the engine to service.
7. Inspect the anode regularly and replace it when substantially consumed or when recommended by the engine manufacturer.

Maintenance and Corrosion Protection

Anodes are sacrificial components and are expected to wear during service. Inspection frequency depends on water conditions, electrical bonding, operating hours, and the condition of the surrounding equipment. Replace a depleted or badly damaged anode promptly, and investigate unusual lack of wear or uneven erosion because it may indicate poor electrical contact, bonding problems, or other corrosion-control issues.

Troubleshooting & FAQ

What does this anode replace?

The company catalog lists 18-6001 as the aftermarket reference and identifies Volvo Penta references 3838499, 800476, 804107, 838929, and 858501.

Is this a kit?

No. The company catalog identifies the matching product as a single anode. The package contains one zinc pencil anode.

Can I use this zinc anode in freshwater?

The supporting catalog specifies zinc for saltwater-only applications. Do not substitute this zinc anode for a freshwater or mixed-water application unless the engine or anode manufacturer specifically approves it.

How do I confirm compatibility?

Compare the original anode's material, overall dimensions, thread or mounting arrangement, and installation location. Then verify the complete engine model and serial-number requirements in the applicable service documentation.

Why is the anode wearing unevenly or not wearing?

Uneven or minimal wear can be associated with poor electrical contact, bonding problems, coatings, or unusual water conditions. Check the mounting contact and bonding system, and consult a qualified marine technician if the condition persists.

Can I paint or coat the anode?

No. Paint and insulating coatings prevent the zinc from functioning correctly. Keep the working zinc surface exposed and ensure the mounting connection provides reliable electrical contact.

Is this an OEM part?

No. This is an aftermarket replacement for the listed Volvo Penta references. Volvo Penta is a trademark of its respective owner and is used only to identify application and replacement references.

Safety and Important Information

• Verify the original part and the complete engine application before ordering.
• Do not rely on a model name alone when year, serial number, mounting location, or configuration may affect fitment.
• Use zinc only where the application calls for zinc and saltwater service.
• Professional installation is recommended when access is restricted or the original fitting is seized or corroded.

About Sea Sierra

Sea Sierra supplies aftermarket marine replacement parts and application-focused components. For the best fit, compare the original component and verify the manufacturer's service information before installation.