MG Duff 806190Q1 Mercury MerCruiser Bravo I II III Trim Cylinder Horseshoe Anode

MG Duff CM806190 Mercury 806190Q1 MerCruiser Bravo I II III Trim Cylinder Horseshoe Anode – Zinc / Aluminium / Magnesium

The MG Duff CM806190 series includes sacrificial horseshoe anodes designed for the lift and trim cylinder ram ends of compatible Mercury and MerCruiser Bravo I, Bravo II and Bravo III sterndrives. These replacement anodes correspond to Mercury OEM part number 806190Q1.

Three material versions are available: zinc (CM806190Z), aluminium (CM806190A) and magnesium (CM806190M). The anodes provide sacrificial corrosion protection for electrically connected metallic components of the trim cylinder assembly.

Each horseshoe anode measures 51 mm in length, 46 mm in width and 51 mm in height. The mounting arrangement includes two fixing holes positioned on 38 mm centres, with a specified 4 mm stud size.

Important: Two anodes are required per assembly. Each MG Duff CM806190 anode is sold individually, so order a quantity of two for a complete replacement.

Technical Specifications

Available Material Variants

All three variants have the same specified mounting dimensions. The appropriate material should be selected according to the vessel's operating conditions and the propulsion equipment manufacturer's recommendations.

Mercury and MerCruiser Bravo Compatibility

The MG Duff CM806190 horseshoe anodes are specified for compatible lift and trim cylinder ram end installations on the following sterndrives:

• MerCruiser Bravo I (Bravo 1)
• MerCruiser Bravo II (Bravo 2)
• MerCruiser Bravo III (Bravo 3)

The anodes are fitted at the trim cylinder ram end mounting position and correspond to Mercury original part number 806190Q1.

Before ordering, confirm the original Mercury part number, drive model and trim cylinder mounting arrangement. Individual drive configurations may differ depending on the equipment version.

Trim Cylinder Horseshoe Anode Construction

The CM806190 series features a horseshoe-shaped sacrificial anode body designed for the corresponding lift and trim cylinder ram end.

The specified mounting dimensions are:

• Length: 51 mm
• Width: 46 mm
• Height: 51 mm
• Fixing holes: 2
• Fixing-hole centre distance: 38 mm
• Stud size: 4 mm

These dimensions apply to the zinc, aluminium and magnesium versions. Compare the existing horseshoe anode and mounting-hole positions with the replacement before installation.

Two Anodes Required per Assembly

Two MG Duff CM806190 horseshoe anodes are required per assembly. The product is sold as one individual anode rather than a pair.

For a complete replacement on one compatible assembly, order 2 pieces of the appropriate material variant.

The quantity requirement is separate from the sales unit and should be considered when planning trim cylinder maintenance.

Zinc, Aluminium and Magnesium Corrosion Protection

The MG Duff CM806190 series is available in three sacrificial anode materials:

• Zinc – CM806190Z: Commonly used for galvanic corrosion protection in saltwater environments.
• Aluminium – CM806190A: Used in suitable marine corrosion protection systems, including saltwater and certain brackish-water conditions.
• Magnesium – CM806190M: Generally selected for freshwater corrosion protection systems.

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 components.

The correct anode material should be selected according to operating water conditions and Mercury / MerCruiser maintenance recommendations.

Inspection and Replacement

Inspect both trim cylinder ram end anodes periodically during routine sterndrive maintenance. Replace them when the sacrificial material becomes significantly depleted, physically damaged or no longer securely attached.

Before installation, verify the 38 mm fixing-hole centre distance, check the mounting surfaces and ensure that the replacement anodes match the original trim cylinder configuration.

Follow the applicable Mercury or MerCruiser maintenance procedures when installing the replacement components.

Part Numbers and Cross-References

• MG Duff Zinc: CM806190Z
• MG Duff Aluminium: CM806190A
• MG Duff Magnesium: CM806190M
• Mercury OEM: 806190Q1
• Zinc EAN: 0628309100995
• Aluminium EAN: 0628309115418
• Magnesium EAN: 0628309114961

Scope of Supply

1 × MG Duff Mercury / MerCruiser Bravo Trim Cylinder Horseshoe Anode in the selected material:

• CM806190Z – Zinc; or
• CM806190A – Aluminium; or
• CM806190M – Magnesium.

Note: Two anodes are required per assembly. Each anode is purchased separately.