MG Duff Volvo Penta SX-A / APS-A Block Anode – Zinc / Aluminium

MG Duff CM3841427Z / CM3841427A Volvo Penta SX-A / APS-A Block Anode – Zinc / Aluminium

The MG Duff CM3841427Z and CM3841427A are sacrificial block anodes designed for compatible Volvo Penta SX-A and APS-A sterndrives. They provide replaceable corrosion protection for electrically connected underwater metallic components of the propulsion system.

The anodes are available in two materials: zinc (CM3841427Z) and aluminium (CM3841427A). Both variants are intended for the specified Volvo Penta drive applications and are sold individually.

When correctly installed with suitable electrical continuity, the sacrificial anode material corrodes preferentially, helping reduce galvanic corrosion of the protected sterndrive components.

Technical Specifications

Available Variants

Volvo Penta Sterndrive Compatibility

The MG Duff CM3841427 series is listed for the following Volvo Penta sterndrive configurations:

• Volvo Penta SX-A
• Volvo Penta APS-A

Before ordering, confirm the exact drive model and compare the existing block anode with the replacement component.

The supplied product information does not specify additional compatible sterndrive models, production years or Volvo Penta original equipment part numbers.

Block Anode Construction

The CM3841427 series features a block-style sacrificial anode intended for the corresponding mounting position on compatible Volvo Penta sterndrives.

The available specifications identify the manufacturer part numbers, materials and drive applications. Overall dimensions, weight, fixing-hole spacing and fastening specifications have not been provided.

These details should be verified against the existing anode or the manufacturer's technical drawing before ordering.

Zinc and Aluminium Sacrificial Corrosion Protection

Two sacrificial anode materials are available:

• Zinc – CM3841427Z: Commonly used for galvanic corrosion protection in saltwater marine environments.
• Aluminium – CM3841427A: Used in suitable marine corrosion protection systems, including saltwater and certain brackish-water environments.

The sacrificial material is designed to corrode preferentially when electrically connected to the metallic components requiring protection.

Select the appropriate material according to the vessel's operating water conditions and Volvo Penta's recommendations. The choice of anode material should also be consistent with the vessel's existing corrosion protection arrangement.

Inspection and Replacement

Inspect the block anode periodically during routine sterndrive maintenance. Replace it when the sacrificial material becomes significantly depleted, physically damaged or no longer securely attached.

Before installation, verify the original anode configuration, inspect the mounting and electrical contact surfaces, and follow the applicable Volvo Penta maintenance instructions.

Part Numbers and Product Identification

• MG Duff Zinc: CM3841427Z
• MG Duff Aluminium: CM3841427A
• Zinc EAN: 8720193084299
• Aluminium EAN: 0628309126360
• Compatible Drives: Volvo Penta SX-A / APS-A

Scope of Supply

1 × MG Duff Volvo Penta SX-A / APS-A Block Anode in the selected material:

• CM3841427Z – Zinc; or
• CM3841427A – Aluminium.