MGDUFF is a UK specialist in marine cathodic protection and sacrificial anodes for boats, yachts, commercial vessels, and other marine applications. MGDUFF anodes are designed to protect submerged metal components from galvanic corrosion and are available for hulls, shafts, propellers, engines, sterndrives, saildrives, thrusters, and other underwater equipment.
The MGDUFF range includes zinc, aluminium, and magnesium anodes manufactured in the UK for different water environments and marine installations. Zinc anodes are used primarily in salt water, aluminium anodes are suitable for salt and brackish water, and magnesium anodes are intended for fresh water applications.
MGDUFF cathodic protection products include individual sacrificial anodes, replacement anodes for engines and propulsion systems, hull anodes, shaft and propeller anodes, and other components used to protect underwater metalwork. Products are available in different sizes, materials, and mounting configurations to suit both recreational and commercial vessels.
At Yacht-Supply24.com, we supply MGDUFF anodes and can assist with product identification, material selection, dimensions, OEM cross-references, and finding the correct replacement for an existing cathodic protection system.
Send us your request if you need help identifying the correct MGDUFF anode or compatible replacement.
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1-2 weeks delivery time The MG Duff CM392462Z is a zinc sacrificial horseshoe anode designed for compatible Bombardier, Johnson and Evinrude outboard motors. Its horseshoe-shaped configuration provides a replaceable corrosion protection component for electrically connected underwater metallic parts of the propulsion system. Manufactured from zinc, the anode helps reduce galvanic corrosion when correctly installed with suitable electrical continuity. It is supplied individually under MG Duff part number CM392462Z, with EAN 0628309100346. Verify the original anode shape, mounting arrangement and compatibility with the specific outboard model before ordering. |
$ 37.10
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1-2 weeks delivery time The MG Duff CM984513Z is a zinc sacrificial horseshoe anode designed for compatible marine front gear case installations. Its horseshoe-shaped configuration provides a replaceable sacrificial component intended to help protect electrically connected underwater metallic gearcase parts against galvanic corrosion. Manufactured from zinc, the anode is identified by MG Duff part number CM984513Z and EAN 0628309101534, and is sold individually. Before ordering, verify the original anode shape, mounting arrangement and compatibility with the specific marine propulsion system. |
$ 49.17
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1-2 weeks delivery time The MG Duff CM34127Z is a zinc long skeg trim tab sacrificial anode for compatible Mercury outboard and MerCruiser sterndrive applications, replacing Mercury OEM part numbers 34127T2 and 34127A1. Listed for MerCruiser 80–140 HP applications, the anode measures 89 mm in outside diameter and 127 mm in height, weighs 0.59 kg and features one fixing hole with a specified 7/16-14 UNC thread size. Its long skeg configuration provides sacrificial corrosion protection for electrically connected underwater metallic components, particularly in saltwater environments. Supplied individually. Verify the existing trim tab shape, thread specification and drive compatibility before ordering. |
$ 24.53
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1-2 weeks delivery time The MG Duff CM818298Z and CM818298A are sacrificial bar anodes for compatible Mercury outboard and MerCruiser marine propulsion applications, with Mercury reference 818298Q1 listed for the aluminium version. The anodes are identified for Mercury 40 HP and V6 135, 150 and 175 HP Verado applications. Both measure 194 mm in length, 51 mm in width and 12 mm in height, with four fixing holes, 178 mm and 167 mm fixing-hole centre measurements and a specified 6 mm stud size. The zinc CM818298Z weighs 0.66 kg, while the aluminium CM818298A weighs 0.26 kg. These sacrificial anodes help protect electrically connected metallic components against galvanic corrosion. Verify the exact engine model and mounting arrangement before ordering. |
$ 27.47
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1-2 weeks delivery time The MG Duff CM823661Z is a zinc pencil anode for compatible Volvo Penta marine engines, including TAMD60, MD70, TAMD70, D12 and TAMD122 series. Designed for sacrificial corrosion protection in saltwater cooling systems, the anode has an outside diameter of 26 mm, an overall length of 53 mm and a zinc anode body length of 43 mm, with a 3/8-16 UNC thread specification. It weighs 0.14 kg and is supplied individually. Compatible applications include TAMD60 A/B/C, MD70B/C, TAMD70 B/C/D/E, D12 500/700/715/800 and TAMD122 A/C/D/P/P-A/P-B/P-C. MG Duff part number CM823661Z, EAN 8720193084404. Verify the original anode and thread specification before ordering. |
$ 19.50
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1-2 weeks delivery time The MG Duff CM838929Z is a zinc pencil anode for compatible Volvo Penta 200, 250 and 270 series marine engines and installations, corresponding to Volvo Penta OEM part number 838929. Specified for saltwater corrosion protection, the anode measures 18 mm in outside diameter and 43 mm in height, with a 7/16-14 UNC external thread and M8 internal thread, and weighs 0.11 kg. Listed engine applications include MD40A, TMD40 A/B/C, D4, D6, TAMD63, TAMD74, TAMD75, TAMD122P, D12C, TAMD163P-A, 2001/2002/2003, TAMD103, TAMD122A, TAMD162C and TAMD163A-A. Supplied individually under MG Duff part number CM838929Z, EAN 8720193084411. Verify the original anode, both thread specifications and engine compatibility before ordering. |
$ 7.86
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1-2 weeks delivery time The MG Duff CM76214Z and CM76214A are circular flat plate sacrificial anodes for compatible Mercury outboards and MerCruiser Alpha One Generation II, Bravo I, Bravo II and Bravo III sterndrives, with listed Mercury references 76214Q5 and 76214A6. Both versions measure 90 × 90 mm and feature one mounting hole with a specified 7/16-14 UNC fastening size and a 1 3/4-inch bolt length requirement. The zinc CM76214Z measures 24 mm in depth and weighs 0.28 kg, while the aluminium CM76214A measures 20 mm in depth and weighs 0.11 kg. The anodes provide sacrificial corrosion protection for electrically connected underwater metallic propulsion components. Verify the original anode dimensions, mounting hardware and drive configuration before ordering. |
$ 16.07
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1-2 weeks delivery time The MG Duff CM762145Z and CM762145A are circular sacrificial plate anodes for compatible Mercury outboard and MerCruiser sterndrive applications, including Bravo III from 2004 onwards, Verado 6-cylinder engines and listed Mercury Alpha configurations. Identified by Mercury reference 76214-5, these anodes measure 92 mm in outside diameter and 24 mm in height, with one 7/16-14 UNC threaded fixing hole and a specified mounting bolt length of 1 3/4 inches. The zinc CM762145Z weighs 0.33 kg, while the aluminium CM762145A weighs 0.13 kg. Both versions provide sacrificial corrosion protection for electrically connected underwater metallic components. Verify the original anode, mounting thread and drive compatibility before ordering. |
$ 16.59
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1-2 weeks delivery time The MG Duff CM762144Z and CM762144A are circular flat plate sacrificial anodes designed for mounting above the propeller on compatible MerCruiser Bravo III sterndrives from 2004 onwards, with the supplied serial number reference 0M179452+ and Mercury part number 76214-4. Both versions measure 91 × 91 × 24 mm and feature one recessed, unthreaded fixing hole with a diameter of 13 mm. The zinc CM762144Z weighs 0.31 kg, while the aluminium CM762144A weighs 0.13 kg. These anodes provide sacrificial corrosion protection for electrically connected underwater metallic components of the drive assembly. Each anode is supplied individually. Verify the original mounting arrangement and drive serial number before ordering. |
$ 16.59
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1-2 weeks delivery time The MG Duff CM806188Z and CM806188A are sacrificial bearing carrier ring anodes designed for installation behind the propeller on compatible MerCruiser Bravo I sterndrives, corresponding to Mercury OEM references 806188A2 and 806188A1. Both variants measure 70 mm in outside diameter and 23 mm in height, with two fixing holes positioned on 74 mm centres and a specified 4 mm stud size. The zinc CM806188Z weighs 0.15 kg and is intended for suitable saltwater corrosion protection systems, while the aluminium CM806188A weighs 0.06 kg and is suitable for appropriate saltwater and brackish-water applications. Each anode is supplied individually. Verify the original bearing carrier configuration and drive compatibility before ordering. |
$ 44.68
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1-2 weeks delivery time The MG Duff CMV18Z and CMV18A are large propeller ring sacrificial anodes for compatible Volvo Penta 280 and 290 sterndrives, corresponding to Volvo Penta OEM part number 875815. Both versions measure 120 mm in outside diameter, 61 mm in inside diameter and 34 mm in height, with two fixing holes positioned on 61 mm centres and a specified 8 mm stud size. The zinc CMV18Z weighs 0.73 kg, while the aluminium CMV18A weighs 0.29 kg. Listed applications include Volvo Penta 280, 280B/C/D/E/SP/T/PT and 290, 290A/B/D/SP, SP-A/A1/A2, SP-C and SP-E configurations. These anodes provide sacrificial corrosion protection for electrically connected underwater metallic sterndrive components. Verify the original anode and mounting dimensions before ordering. |
$ 35.74
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1-2 weeks delivery time The MG Duff CM875821Z and CM875821A are sacrificial duo propeller ring anodes for compatible Volvo Penta 280 and 290 Duo Prop sterndrives, corresponding to Volvo Penta OEM part number 875821. Listed drive configurations include 280DP, 280T-DP, 280A-DP and DP-A, DP-A1, DP-A2, DP-B, DP-B1, DP-C, DP-C1, DP-D, DP-D1, DP-D2, DP-E and DP-G. The specified anode dimensions are 145 mm in length and 29 mm in height, with two fixing holes positioned on 92 mm centres and an 8 mm stud size. Available in zinc (CM875821Z) and aluminium (CM875821A), these anodes provide sacrificial corrosion protection for electrically connected underwater sterndrive components. The zinc version weighs 0.58 kg. Each anode is sold individually; verify the original mounting dimensions and drive configuration before ordering. |
$ 36.63
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1-2 weeks delivery time The MG Duff CM875812Z and CM875812A are sacrificial propeller ring anodes for the Volvo Penta 110S Saildrive, corresponding to Volvo Penta OEM part number 876286. Both variants have a specified length of 140 mm and height of 43 mm, with four fixing holes spaced at 65 mm centres and a 5 mm stud size. The zinc CM875812Z weighs 0.92 kg and is intended for suitable saltwater corrosion protection applications, while the aluminium CM875812A weighs 0.41 kg and is specified for saltwater and brackish-water use. These anodes help protect electrically connected underwater metallic saildrive components against galvanic corrosion. Supplied individually in the selected material. Verify the original anode and mounting configuration before ordering. |
$ 43.49
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1-2 weeks delivery time The MG Duff CM851983Z and CM851983A are sacrificial ring anodes for compatible Volvo Penta 120 Saildrive installations, corresponding to Volvo Penta OEM part number 876604. Listed applications include the 120, 120B, 120C, 120D, 120E, S120C, MS25S, MS25S-A and MS25S-R. Both versions measure 124 × 96 × 27 mm and feature two fixing holes spaced 73 mm between centres, with a specified 6 mm stud size. The zinc CM851983Z weighs 0.49 kg and is intended for saltwater corrosion protection, while the aluminium CM851983A weighs 0.24 kg and is specified for saltwater and brackish-water applications. Each variant is sold individually. Verify the original anode and saildrive configuration before ordering. |
$ 42.71
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1-2 weeks delivery time The MG Duff CM358407Z and CM358407A are split ring assembly sacrificial anodes for compatible Volvo Penta 130S and 150S Saildrive installations, particularly the listed 2002–2003 series, corresponding to Volvo Penta part numbers 3586963 and 3888305. Applications include MS25S(A,R), 130S, 130S-A, 130SR-A, 130SB, 130SR-B, 150S, 150S-A, 150SR-A, 150S-B and 150SR-B. Both versions measure 108 mm in outside diameter, 45 mm in inside diameter and 40 mm in height. The zinc CM358407Z weighs 1.48 kg and is intended for saltwater corrosion protection, while the aluminium CM358407A weighs 0.65 kg and is specified for suitable saltwater and brackish-water applications. Verify the Saildrive model, original part number and mounting configuration before ordering. |
$ 65.47
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1-2 weeks delivery time The MG Duff CMV15Z is a zinc small propeller ring anode for Volvo Penta 100 sterndrives, corresponding to Volvo Penta OEM part number 875810. Designed for sacrificial corrosion protection of electrically connected underwater metallic components, the anode measures 99 mm in outside diameter, 51 mm in inside diameter and 11 mm in height. It features two fixing holes spaced 67 mm between centres, with a specified 10 mm stud size. The anode weighs 0.20 kg and is suitable for saltwater corrosion protection applications. Supplied individually under MG Duff part number CMV15Z, EAN 8720193084428. Verify the original anode dimensions and mounting configuration before ordering. |
$ 19.90
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1-2 weeks delivery time The MG Duff CM6884537102Z is a zinc skeg and trim tab sacrificial anode designed for compatible Yamaha 50, 60, 70, 75, 80, 85 and 90 HP outboard motors, with additional compatibility references for Parsun and Painier outboards. Intended for saltwater corrosion protection, the anode measures 92 mm in outside diameter and 77 mm in height, features an M10 × 1.25 mounting thread and weighs 0.48 kg. Its sacrificial zinc construction helps protect electrically connected underwater metallic components against galvanic corrosion. Supplied individually. Verify the original trim tab configuration, engine model and mounting thread before ordering. |
$ 25.61
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1-2 weeks delivery time The MG Duff CM6644537101Z is a zinc cut down skeg trim tab sacrificial anode for compatible Yamaha and Honda outboard motors. Designed for saltwater corrosion protection, the anode measures 96 mm in outside diameter and 57 mm in height, with a specified 8 mm stud size and a weight of 0.27 kg. Its compact cut down skeg configuration provides sacrificial protection for electrically connected underwater metallic components of the outboard drive assembly. Supplied individually under MG Duff part number CM6644537101Z. Verify the original trim tab shape, mounting arrangement and engine compatibility before ordering. |
$ 22.89
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What is MGDUFF known for?
MGDUFF specializes in marine cathodic protection systems and sacrificial anodes for boats, yachts, commercial vessels, and other marine applications.
Its product range includes anodes for hulls, shafts, propellers, engines, sterndrives, saildrives, thrusters, and other submerged metal components.
What types of MGDUFF anodes are available?
MGDUFF manufactures zinc, aluminium, and magnesium sacrificial anodes in a wide range of shapes, sizes, and mounting configurations.
The range includes hull anodes, shaft and propeller anodes, engine and drive anodes, and replacement products for many common marine applications.
What is the difference between MGDUFF zinc, aluminium, and magnesium anodes?
MGDUFF zinc anodes are primarily used in salt water, while aluminium anodes are suitable for salt and brackish water. Magnesium anodes are intended for fresh water applications.
The correct material should be selected according to the water environment and the equipment being protected.
Where are MGDUFF anodes manufactured?
MGDUFF manufactures its sacrificial anodes in the United Kingdom. The company produces zinc, aluminium, and magnesium anodes for recreational, commercial, and professional marine applications.
Can MGDUFF anodes be used as replacements for original equipment anodes?
Yes. Many MGDUFF products are designed as replacement anodes for engines, sterndrives, saildrives, propellers, shafts, and other marine equipment.
The correct replacement can often be identified using the original part number, equipment model, dimensions, shape, and mounting arrangement.
How can I choose the correct MGDUFF cathodic protection anode?
Selection should consider the type of water, material being protected, vessel or equipment type, anode dimensions, mounting method, and existing cathodic protection arrangement.
For hull applications, vessel size and wetted surface area may also influence the number and size of anodes required.
When should MGDUFF anodes be replaced?
MGDUFF recommends regular inspection of sacrificial anodes and replacement when they are more than approximately 50% consumed.
Actual wear rate depends on water conditions, vessel use, electrical continuity, surrounding metals, and the installed anode material.
How can I identify the correct MGDUFF replacement anode?
Useful information includes the MGDUFF or OEM part number, equipment manufacturer and model, anode dimensions, mounting-hole spacing, material, and photographs of the existing component.
These details help distinguish between similar MGDUFF anodes and confirm the correct replacement.