MG Duff 3586963 3888305 Volvo Penta 130S / 150S Saildrive Split Ring Anode

MG Duff CM358407 Volvo Penta 3586963 / 3888305 130S / 150S Saildrive Split Ring Anode – Zinc / Aluminium

The MG Duff CM358407Z and CM358407A are split ring assembly sacrificial anodes designed for compatible Volvo Penta 130S and 150S Saildrive systems, including the listed 2002–2003 series applications.

These replacement anodes correspond to Volvo Penta part numbers 3586963 and 3888305 and provide sacrificial corrosion protection for electrically connected underwater metallic components of the Saildrive assembly.

The product features a split ring configuration and is available in two materials: zinc (CM358407Z) and aluminium (CM358407A).

Both versions measure 108 mm in outside diameter, 45 mm in inside diameter and 40 mm in height. The zinc version weighs 1.48 kg, while the aluminium version weighs 0.65 kg.

Technical Specifications

Available Material Variants

Both variants share the same specified dimensions. The primary differences are the sacrificial material and weight.

Volvo Penta Saildrive Compatibility

The MG Duff CM358407 series is listed for the following Volvo Penta Saildrive configurations:

The supplied product information identifies the 2002–2003 Volvo Penta 130 / 150 Saildrive series as the relevant application period.

Before ordering, confirm the exact Saildrive designation and compare the original anode against Volvo Penta part numbers 3586963 and 3888305.

Split Ring Design and Dimensions

The CM358407 series uses a split ring configuration intended for the corresponding mounting position on compatible Volvo Penta Saildrive assemblies.

• Outside diameter: 108 mm
• Inside diameter: 45 mm
• Height: 40 mm
• Configuration: Split Ring Assembly

The outside and inside diameters are separate dimensions. Both should be checked when confirming compatibility with the existing Saildrive installation.

The supplied technical specifications do not identify the number of fixing holes, fastener sizes or detailed assembly hardware. These should be verified against the original anode and the applicable Volvo Penta parts documentation.

Zinc and Aluminium Sacrificial Corrosion Protection

The MG Duff CM358407 series is available in two materials:

• Zinc – CM358407Z: Weighs 1.48 kg and is specified for sacrificial corrosion protection in saltwater applications.
• Aluminium – CM358407A: Weighs 0.65 kg and is specified for suitable saltwater and brackish-water applications.

When correctly installed with suitable electrical continuity to metallic components requiring protection, the sacrificial material corrodes preferentially, helping reduce galvanic corrosion of electrically connected underwater Saildrive components.

Select the appropriate anode material according to operating water conditions and Volvo Penta's corrosion protection recommendations.

Inspection and Replacement

Inspect the Saildrive split ring anode periodically during routine propulsion system maintenance. Replace it when the sacrificial material becomes significantly depleted, damaged or no longer securely attached.

Before fitting a replacement:

• Confirm the Volvo Penta Saildrive model and application year.
• Check the original part reference 3586963 or 3888305.
• Verify the 108 mm outside diameter.
• Verify the 45 mm inside diameter.
• Check the 40 mm height.
• Inspect the split ring mounting arrangement.
• Follow the applicable Volvo Penta installation instructions.

Part Numbers and Cross-References

• MG Duff Zinc: CM358407Z
• MG Duff Aluminium: CM358407A
• Volvo Penta OEM: 3586963
• Volvo Penta OEM: 3888305
• Zinc Weight: 1.48 kg
• Aluminium Weight: 0.65 kg

Scope of Supply

1 × MG Duff Volvo Penta 130S / 150S Split Ring Anode Assembly in the selected material:

• CM358407Z – Zinc; or
• CM358407A – Aluminium.

The exact number of assembly components and inclusion of mounting hardware are not specified in the supplied product information.