MG Duff 852835 Volvo Penta Duo Prop 290 Sterndrive Bar Anode – Zinc / Aluminium

MG Duff CM852835Z / CM852835A Volvo Penta 852835 Duo Prop 290 Sterndrive Bar Anode – Zinc / Aluminium

The MG Duff CM852835Z and CM852835A are sacrificial bar anodes designed for Volvo Penta 290 Duo Prop and compatible sterndrive installations. Both variants correspond to Volvo Penta OEM part number 852835 and are available in zinc and aluminium.

These replacement anodes provide sacrificial galvanic corrosion protection for electrically connected underwater metallic components of compatible sterndrive assemblies. The zinc and aluminium versions share the same dimensions and mounting configuration, allowing selection according to the vessel's operating water conditions.

The anode measures 136 mm in length, 46 mm in width and 26 mm in height. Its mounting arrangement includes two fixing holes positioned on 86 mm centres, with a specified 8 mm stud size.

Technical Specifications

Available Variants

Both versions correspond to Volvo Penta part number 852835 and share the same specified mounting dimensions.

Volvo Penta Sterndrive Compatibility

The MG Duff CM852835 series is specified for the following Volvo Penta sterndrive configurations:

• Volvo Penta 290
• Volvo Penta A, A-DP, B and D
• Volvo Penta DP, DP-A, DP-A1, DP-A2
• Volvo Penta DP-B, DP-B1
• Volvo Penta DP-C, DP-C1
• Volvo Penta DP-D, DP-D1, DP-D2
• Volvo Penta DP-E, DP-G
• Volvo Penta SP, SP-A, SP-A1, SP-A2, SP-C, SP-E

Compatibility should be confirmed using Volvo Penta original part number 852835 and the existing anode mounting dimensions. Individual sterndrive configurations may differ despite belonging to the same model family.

Bar Anode Construction and Mounting Dimensions

The anode features a bar-shaped sacrificial metal body with two fixing holes for attachment to the corresponding sterndrive mounting position.

• Length: 136 mm
• Width: 46 mm
• Height: 26 mm
• Fixing Holes: 2
• Fixing Hole Centres: 86 mm
• Stud Size: 8 mm

These dimensions apply to both zinc and aluminium versions. Before ordering, compare the original anode shape, fixing-hole positions and mounting dimensions with the replacement component.

Zinc and Aluminium Sacrificial Corrosion Protection

The MG Duff CM852835 series is available in two sacrificial anode materials:

• Zinc – CM852835Z: Commonly used for corrosion protection in saltwater marine environments.
• Aluminium – CM852835A: Used in suitable marine corrosion protection systems, including saltwater and certain brackish-water conditions.

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

The appropriate material should be selected according to the vessel's operating water conditions and Volvo Penta's recommendations.

Inspection and Replacement

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

During replacement, verify the two fixing-hole positions, 86 mm centre distance and 8 mm stud specification. Inspect the mounting surfaces and follow the applicable Volvo Penta installation instructions.

Part Numbers and Cross-References

• MG Duff Zinc: CM852835Z
• MG Duff Aluminium: CM852835A
• Volvo Penta OEM: 852835
• Zinc EAN: 0628309101367
• Aluminium EAN: 0628309122683

Scope of Supply

1 × MG Duff Volvo Penta 290 Duo Prop Sterndrive Bar Anode in the selected material.