MG Duff CM983494Z OMC Johnson / Evinrude 90 HP Upper Gear Case Horseshoe Zinc Anode

MG Duff CM983494Z OMC Johnson / Evinrude 90 HP Upper Gear Case Horseshoe Zinc Anode

The MG Duff CM983494Z is a zinc sacrificial horseshoe anode designed for the upper gear case of compatible OMC, Bombardier, Johnson and Evinrude outboard motors. The supplied application information identifies OMC 90 HP.

Manufactured from zinc, the anode provides sacrificial galvanic corrosion protection for electrically connected underwater metallic components of compatible marine propulsion systems.

The CM983494Z has a horseshoe-shaped body measuring 146 mm in length, 104 mm in width and 25 mm in height. Its specified weight is 0.680 kg (680 g).

Technical Specifications

OMC, Johnson and Evinrude Compatibility

The MG Duff CM983494Z is listed as an upper gear case horseshoe anode for compatible Bombardier, Johnson and Evinrude outboard applications, with an OMC 90 HP reference.

• OMC: 90 HP application reference
• Johnson / Evinrude: Compatible upper gear case installations
• Bombardier: Listed in the product application description

Specific engine model numbers, production years and original equipment part numbers have not been supplied. Before ordering, confirm compatibility against the existing anode and the relevant engine parts documentation.

Horseshoe Anode Dimensions

The CM983494Z features a horseshoe-shaped zinc body intended for the corresponding upper gear case mounting position.

• Length: 146 mm
• Width: 104 mm
• Height: 25 mm
• Weight: 0.680 kg
• Configuration: Horseshoe

The supplied specifications do not identify the number of fixing holes, hole spacing or fastener dimensions. Verify the mounting arrangement against the original anode before installation.

Zinc Sacrificial Corrosion Protection

The MG Duff CM983494Z is manufactured from zinc, a sacrificial anode material commonly used for galvanic corrosion protection in saltwater marine environments.

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

Select and maintain the anode according to the vessel's operating water conditions and the engine manufacturer's corrosion protection recommendations.

Inspection and Replacement

Inspect the upper gear case horseshoe anode periodically during routine outboard maintenance. Replace it when the zinc becomes significantly depleted, physically damaged or no longer securely attached.

Before fitting a replacement:

• Confirm the outboard manufacturer and engine model.
• Compare the horseshoe shape with the existing anode.
• Verify the 146 × 104 × 25 mm body dimensions.
• Check the original fixing-hole arrangement and mounting hardware.
• Inspect the mounting surfaces and follow the applicable manufacturer's installation instructions.

Part Number and Product Identification

• MG Duff Part Number: CM983494Z
• Material: Zinc
• Application: OMC / Johnson / Evinrude Upper Gear Case
• Listed Power Rating: 90 HP
• Dimensions: 146 × 104 × 25 mm
• Weight: 0.680 kg
• EAN: 0628309101497

Scope of Supply

1 × MG Duff CM983494Z Upper Gear Case Horseshoe Zinc Anode.

Mounting hardware inclusion is not confirmed in the supplied product specifications.