MerCruiser anodes are sacrificial components designed to protect sterndrives, transom assemblies, trim systems, and other submerged metal parts from galvanic corrosion. They corrode preferentially and help protect more valuable components of the propulsion system. MerCruiser anodes are available in different shapes, sizes, kits, and materials for specific drive models and mounting positions. When selecting a replacement anode, the MerCruiser drive model, OEM part number, installation location, dimensions, and anode material should be checked carefully to ensure correct compatibility.
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1-2 weeks delivery time The Tecnoseal 00801 is a zinc long trim tab anode designed for Mercury/Mercruiser 80–140 HP engines, corresponding to OEM part number 34127. It features a circular base with an extended trim tab fin, providing sacrificial corrosion protection for compatible marine drive components. The anode measures 90 mm (3.54") in diameter, 99 mm (3.90") in overall height and 17 mm (0.67") in base height, with a 7/16" UNC mounting thread. It weighs 0.60 kg (600 g / 1.32 lbs). Additional Tecnoseal catalogue reference: 01102.
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$ 41.39
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1-2 weeks delivery time The Tecnoseal Mercruiser Alpha One Gimbal Anode is designed for Alpha One and Alpha One Gen II sterndrive systems, corresponding to OEM part number 43994. Available in zinc (00806) and magnesium (00806MG), it provides sacrificial corrosion protection for compatible gimbal and sterndrive components. The anode features a ribbed rectangular body with mounting holes and measures 103 mm (4.06") in length, 78 mm (3.07") in width and 38 mm (1.50") in height, with a mounting hole diameter of 6.50 mm (0.26"). The zinc version weighs 1.00 kg (2.20 lbs), while the magnesium version weighs 0.25 kg (0.55 lbs). Both versions share identical dimensions and mounting specifications.
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$ 51.37
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1-2 weeks delivery time The Tecnoseal 00806BIS Series is a gimbal anode designed for Mercruiser Alpha One and Alpha One Gen II sterndrive systems, corresponding to OEM part number 821631. Available in zinc (00806BIS), aluminium (00806BISAL) and magnesium (00806BISMG), it provides sacrificial corrosion protection for compatible sterndrive components. The anode features a recessed, ribbed body with mounting holes and measures 103 mm (4.06") in length, 78 mm (3.07") in width and 38 mm (1.50") in height, with 6.50 mm (0.26") mounting holes. The zinc version weighs 0.89 kg (890 g), aluminium 0.33 kg (330 g) and magnesium 0.23 kg (230 g). All three versions share the same dimensions.
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$ 61.16
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1-2 weeks delivery time The Tecnoseal 00807 Series is a sacrificial anode nut designed for Mercruiser Alpha One and Bravo One outdrives, corresponding to OEM part number 55989. Available in zinc (00807), aluminium (00807AL) and magnesium (00807MG), it helps protect compatible sterndrive components against galvanic corrosion. The anode has a domed cylindrical body measuring 30 mm (1.18") in height and 31 mm (1.22") in outside diameter, with a 28 mm (1.10") base diameter and a 1/2" UNC internal thread. The zinc version weighs 0.10 kg (100 g), the aluminium version 0.04 kg (40 g) and the magnesium version 0.03 kg (30 g). All three versions share identical dimensions and thread specifications.
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$ 13.81
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1-2 weeks delivery time The Tecnoseal 00808 Series is a square plate anode designed for Mercruiser Alpha One and Bravo One outdrives, corresponding to OEM part number 34762 and additional catalogue reference 00210. Available in zinc (00808) and magnesium (00808MG), it provides sacrificial corrosion protection for compatible sterndrive components. The anode measures 64 × 64 × 10 mm (2.52 × 2.52 × 0.39 in), with a mounting hole centre distance of 50 mm (1.97 in) and a hole diameter of 7 mm (0.28 in). The zinc version weighs 0.27 kg (270 g / 0.60 lbs), while the magnesium version weighs 0.07 kg (70 g / 0.15 lbs). Both versions share identical dimensions and mounting specifications.
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$ 21.07
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1-2 weeks delivery time The Tecnoseal 00814 Series is a sacrificial cavitation plate anode designed for Mercruiser Alpha One Generation II sterndrives, corresponding to OEM part number 821629. Available in zinc (00814), aluminium (00814AL) and magnesium (00814MG), it provides galvanic corrosion protection for compatible sterndrive components. The anode features a semicircular plate with a central cutout and mounting points. It measures 190 mm (7.48") in length (l), 72 mm (2.83") in width (a) and 16 mm (0.63") in height (h), with a mounting dimension (i) of 83 mm (3.27") and a 1/4" UNC thread (m). The zinc version weighs 0.69 kg (690 g), aluminium 0.28 kg (280 g) and magnesium 0.20 kg (200 g). All three versions share identical dimensions.
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$ 63.84
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1-2 weeks delivery time The Tecnoseal 00815 Series is a sacrificial cavitation plate anode designed for Mercruiser Bravo I, Bravo II and Bravo III sterndrives, corresponding to OEM part number 821630. Available in zinc (00815), aluminium (00815AL) and magnesium (00815MG), it helps protect compatible sterndrive components against galvanic corrosion. The anode features a U-shaped plate with two mounting holes and measures 177 mm (6.97") in length, 108 mm (4.25") in width and 14 mm (0.55") in height. Additional mounting dimensions are i = 35 mm (1.38") and Ø = 11 mm (0.43"). The zinc version weighs 0.96 kg (2.12 lbs), the aluminium version 0.36 kg (0.79 lbs) and the magnesium version 0.25 kg (0.55 lbs). All three versions share identical catalogue dimensions.
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$ 67.85
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1-2 weeks delivery time The Tecnoseal 00817 Series is a sacrificial trim cylinder collar anode designed for Mercruiser Alpha One Generation I and Generation II sterndrives, corresponding to OEM part number 806189. Available in zinc (00817), aluminium (00817AL) and magnesium (00817MG), it helps protect compatible trim cylinder components against galvanic corrosion. The anode features a U-shaped collar with two mounting holes and catalogue dimensions of a = 49 mm (1.93"), b = 12 mm (0.47"), c = 21 mm (0.83"), h = 14 mm (0.55"), i = 38 mm (1.50") and mounting hole diameter Ø = 5.50 mm (0.22"). The zinc version weighs 0.12 kg (120 g / 0.26 lbs), aluminium 0.04 kg (40 g / 0.09 lbs) and magnesium 0.03 kg (30 g / 0.07 lbs). All three versions share identical dimensions.
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$ 13.57
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1-2 weeks delivery time The Tecnoseal 00818 Series is a sacrificial trim cylinder collar anode designed for Mercruiser Bravo I, Bravo II and Bravo III sterndrives, corresponding to OEM part number 806190. Available in zinc (00818), aluminium (00818AL) and magnesium (00818MG), it helps protect compatible trim cylinder components against galvanic corrosion. The anode features a U-shaped collar with two mounting holes and catalogue dimensions of a = 49 mm (1.93"), b = 12 mm (0.47"), c = 21 mm (0.83"), h = 51 mm (2.01"), i = 38 mm (1.50") and mounting hole diameter Ø = 5.50 mm (0.22"). The zinc version weighs 0.34 kg (340 g / 0.75 lbs), aluminium 0.14 kg (140 g / 0.31 lbs) and magnesium 0.09 kg (90 g / 0.20 lbs). All three versions share identical dimensions.
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$ 30.33
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1-2 weeks delivery time The Tecnoseal 00819 Series is a sacrificial bearing carrier anode designed for Mercruiser Alpha One Generation II sterndrives, corresponding to OEM part number 806105. Available in zinc (00819), aluminium (00819AL) and magnesium (00819MG), it helps protect compatible bearing carrier components against galvanic corrosion. The anode features a circular collar with four external mounting tabs and catalogue dimensions of height (h) 25 mm (0.98"), overall dimension (i) 74 mm (2.91"), outside diameter (Ø) 73 mm (2.87"), inside diameter (Ø1) 53 mm (2.09") and mounting hole diameter (Ø2) 5.50 mm (0.22"). The zinc version weighs 0.23 kg (230 g / 0.51 lbs), aluminium 0.09 kg (90 g / 0.20 lbs) and magnesium 0.06 kg (60 g / 0.13 lbs). All three versions share identical dimensions.
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$ 43.34
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1-2 weeks delivery time The Tecnoseal 00820 Series is a sacrificial flat trim tab anode designed for Mercury/Mercruiser Alpha One, Bravo and Verado applications, featuring a threaded mounting hole. It corresponds to OEM references 762145, 76214-5, 76214Q5, 76214T1 and 76214M, with Tecnoseal 01850 listed as an additional cross-reference. Available in zinc (00820), aluminium (00820AL) and magnesium (00820MG), it helps protect compatible sterndrive and outboard components against galvanic corrosion. The anode measures 92 mm (3.62") in diameter, with dimensions b = 21 mm (0.83"), c = 58 mm (2.28"), h = 24 mm (0.94") and h1 = 5 mm (0.20"). The mounting thread is 7/16" UNC. The zinc version weighs 0.34 kg (340 g), aluminium 0.13 kg (130 g) and magnesium 0.08 kg (80 g). All three versions share identical dimensions.
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$ 33.23
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1-2 weeks delivery time The Tecnoseal 00826 Series is a sacrificial flat trim tab anode designed for Mercury and Mercruiser marine propulsion applications, corresponding to OEM part number 76214Q5. Available in zinc (00826) and magnesium (00826MG), it helps protect compatible submerged metallic components against galvanic corrosion. The anode features a circular flat plate with a raised central mounting section and an additional mounting hole. It measures 113 mm (4.45") in outside diameter, with plate thickness (h) of 4 mm (0.16"), overall height (h1) of 18 mm (0.71") and catalogue dimension (b) of 21 mm (0.83"). Additional diameters are Ø1 = 17 mm (0.67"), Ø2 = 11 mm (0.43") and Ø3 = 11 mm (0.43"). The zinc version weighs 0.35 kg (350 g / 0.77 lbs), while the magnesium version weighs 0.09 kg (90 g / 0.20 lbs). Both versions share identical dimensions.
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$ 36.76
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1-2 weeks delivery time The Tecnoseal 00828 Series is a sacrificial bearing carrier anode designed for Mercruiser Bravo One sterndrives, corresponding to OEM part number 806188. Available in zinc (00828), aluminium (00828AL) and magnesium (00828MG), it helps protect the bearing carrier and associated submerged components against galvanic corrosion. The anode features an open circular collar with mounting tabs and measures 88 mm (3.46") in overall length (l), 22 mm (0.87") in height (h) and 74 mm (2.91") in dimension (i). Additional diameters are Ø = 54 mm (2.13"), Ø1 = 70 mm (2.76") and Ø2 = 5.50 mm (0.22"). The zinc version weighs 0.17 kg (170 g / 0.37 lbs), aluminium 0.07 kg (70 g / 0.15 lbs) and magnesium 0.04 kg (40 g / 0.09 lbs). All three versions share identical dimensions.
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$ 57.21
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1-2 weeks delivery time The Tecnoseal 00831 Series is a sacrificial cylinder head pencil anode designed for Mercury and Mercruiser marine engines, corresponding to OEM part number 826887 and catalogue cross-reference 01150. Available in zinc (00831) and magnesium (00831MG), it provides galvanic corrosion protection for compatible engine components. The anode has an elongated, tapered body with a circular mounting head. Its dimensions are 41 mm (1.61") in length (l), 13 mm (0.51") in head height (h), 16.50 mm (0.65") in head diameter (Ø) and 8 mm (0.31") in body diameter (Ø1), with additional dimensions a = 4 mm (0.16") and b = 2 mm (0.08"). The zinc version weighs 0.02 kg (20 g / 0.04 lbs), while the magnesium version weighs 0.004 kg (4 g / 0.01 lbs). Both versions share identical dimensions.
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$ 30.57
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1-2 weeks delivery time The Tecnoseal 00835 Series is a flat trim tab sacrificial anode designed for Mercury and Mercruiser marine propulsion systems, corresponding to OEM part number 76214-4 and catalogue cross-reference 08404. Featuring a non-threaded mounting hole, the anode is available in zinc (00835), aluminium (00835AL) and magnesium (00835MG) for galvanic corrosion protection. It has a circular base diameter of 91 mm (3.58"), plate thickness (h) of 5 mm (0.20") and overall height (h1) of 24 mm (0.94"). Additional dimensions are a = 16 mm (0.63"), b = 56 mm (2.20") and Ø1 = 13 mm (0.51"). The zinc version weighs 0.28 kg (280 g / 0.62 lbs), aluminium 0.12 kg (120 g / 0.26 lbs) and magnesium 0.08 kg (80 g / 0.18 lbs). All three variants share identical dimensions.
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$ 35.10
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1-2 weeks delivery time The Tecnoseal 00836 Series is a sacrificial propeller nut anode designed for Mercruiser Bravo III sterndrives, corresponding to OEM part number 865182. Available in zinc (00836), aluminium (00836AL) and magnesium (00836MG), it helps protect the propeller assembly and surrounding submerged metallic components against galvanic corrosion. The anode features a tapered, dome-shaped body with an internal hexagonal recess and central opening. It measures 61 mm (2.40") in height, 54 mm (2.13") in outer diameter and 22 mm (0.87") in opening diameter, with additional catalogue dimensions a = 38 mm (1.50") and b = 21 mm (0.83"). The zinc version weighs 0.51 kg (510 g / 1.12 lbs), aluminium 0.21 kg (210 g / 0.46 lbs) and magnesium 0.13 kg (130 g / 0.29 lbs). All three versions share identical dimensions.
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$ 45.22
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1-2 weeks delivery time The Tecnoseal 00840 Series is a sacrificial bar anode designed for Mercury 50–75 HP, Mercruiser 90–100 HP and Super America 80–150 HP engines, corresponding to original part number 8239121 and catalogue cross-references 00926, 01214 and 01254. Available in zinc (00840), aluminium (00840AL) and magnesium (00840MG), it helps protect compatible submerged engine components against galvanic corrosion. The rectangular bar measures 196 mm (7.72") in length, 40 mm (1.57") in width and 14 mm (0.55") in height. Mounting dimensions include i = 176 mm (6.93"), i1 = 160 mm (6.30"), an oblong opening b = 6.5 × 11 mm (0.26" × 0.43"), and diameters Ø = 6.50 mm (0.26") and Ø2 = 12 mm (0.47"). The zinc version weighs 0.51 kg (510 g / 1.12 lbs), aluminium 0.20 kg (200 g / 0.44 lbs) and magnesium 0.13 kg (130 g / 0.29 lbs). All three variants share identical dimensions.
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$ 57.45
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1-2 weeks delivery time The Tecnoseal KITALPHAONEGEN1 Series is a four-piece sacrificial anode kit designed for Mercruiser Alpha One Generation 1 outdrives. Each kit contains one gimbal anode (00806BIS), one trim tab anode (00800) and two outdrive nuts (00807), with matching component codes for each material version. Available in zinc (KITALPHAONEGEN1, 1.69 kg / 3.73 lbs), aluminium (KITALPHAONEGEN1AL, 0.76 kg / 1.68 lbs) and magnesium (KITALPHAONEGEN1MG, 0.58 kg / 1.28 lbs), the kit provides sacrificial corrosion protection for compatible outdrive components. Mounting hardware is included. Packaging options include a branded box, blister pack, polybag or skin pack.
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$ 103.67
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1-2 weeks delivery time The Tecnoseal KITALPHAONE Series is a six-piece sacrificial anode kit designed for Mercruiser Alpha One Generation 2 (Gen II) sterndrives. Each kit contains one gimbal anode (00806BIS), one cavitation plate anode (00814), one bearing carrier anode (00819), two trim cylinder collar anodes (00817) and one flat trim tab anode (00820), with corresponding part numbers for each material version. Available in zinc (KITALPHAONE, 2.57 kg / 5.67 lbs), aluminium (KITALPHAONE/AL, 1.11 kg / 2.45 lbs) and magnesium (KITALPHAONE-MG, 0.81 kg / 1.79 lbs), the kit provides sacrificial corrosion protection for compatible sterndrive components. Mounting hardware is included. Packaging options include a branded box, blister pack, polybag or skin pack.
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$ 179.85
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1-2 weeks delivery time The Tecnoseal KITBRAVOI Series is a five-piece sacrificial anode kit designed for Mercury Mercruiser Bravo One (Bravo I) sterndrives. Each kit contains one cavitation plate anode (00815), one flat trim tab anode (00820), one bearing carrier anode (00828) and two trim cylinder collar anodes (00818), with corresponding part numbers for each material version. Available in zinc (KITBRAVOI, 2.36 kg / 5.20 lbs), aluminium (KITBRAVOI/AL, 1.04 kg / 2.29 lbs) and magnesium (KITBRAVOI-MG, 0.82 kg / 1.81 lbs), the kit helps protect compatible sterndrive components against galvanic corrosion. Mounting hardware is included. Packaging options include a branded box, blister pack, polybag or skin pack.
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$ 201.25
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What are MerCruiser anodes used for?
MerCruiser anodes provide sacrificial cathodic protection for submerged metal parts of sterndrive and propulsion systems. They are designed to corrode preferentially instead of more valuable drive components.
Where are MerCruiser anodes installed?
Depending on the drive model, MerCruiser anodes may be installed on the sterndrive housing, transom assembly, trim system, cavitation plate, bearing carrier, or other submerged components.
The exact number and location of anodes vary between drive families and configurations.
How do I choose the correct MerCruiser anode?
The most reliable references are the MerCruiser drive model and original OEM part number. The shape, dimensions, mounting-hole spacing, installation position, and anode material should also be checked against the existing component.
Similar-looking anodes may be intended for different drive versions.
Are complete MerCruiser anode kits available?
Yes. Anode kits are available for selected MerCruiser sterndrive systems and may include several sacrificial anodes required for different positions on the drive.
The correct kit should be matched to the exact drive model and configuration.
Are MerCruiser anodes available in different materials?
Yes. Replacement anodes may be available in different sacrificial alloys depending on the drive application and operating environment.
The correct material should be selected according to the drive manufacturer’s recommendations and the water conditions in which the boat operates.
How often should MerCruiser anodes be replaced?
MerCruiser anodes should be inspected regularly and replaced when they are significantly consumed, damaged, or no longer provide sufficient protective surface area.
Replacement frequency depends on water conditions, vessel usage, electrical environment, and the material of the installed anodes.
What information is useful when identifying MerCruiser replacement anodes?
Useful information includes the MerCruiser OEM part number, sterndrive model, serial range where relevant, anode dimensions, mounting position, material, and photographs of the existing component.
These details help distinguish between similar MerCruiser anodes and confirm compatibility before ordering.