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Q: I have a Volvo Penta 80 sport engine with a AQ 100 Outdrive, I am going to be using it in fresh water. I can see you have zinc anodes for the outdrive, I wonder if you have them in Aluminium or Magnesium?

You are correct that only zinc anodes are availble for the AQ100 drive. If you are only using the drive in fresh water, and not moving into salt or brackish water in use, then the correct anodes to fit would be magnesium. If you are actually operating in brackish water then aluminium anodes would be the correct choice.

I would suggest that having decided on the best anode material to use, you could actually fit a small disc anode to the boats transom and bond this to the outdrive.This will work the same as fitting the anode to the drive. I would suggest a AD56 (aluminium for brackish water) or a MD56 (magnesium for fresh warter) would be ample.

To fit the disc anode, it needs to be mounted to the hull close to the outdrive using an M10B mounting stud. Then some 4mm bonding wire can be used to connect the anode to bolt to the outdrive. This provides the return path for the circuit. The connection to the drive should be via one of the transom mounting bolts that bolts the drive to the hull. Or can be attached to any other point that is viable on the outdrive that will provide continuity to the drive. There are more details in our fitting instrcutions page.

We have assumed this is a GRP boat, therefore the anode will only protect the out drive. If the boat is steel or aluminium then you will need further anodes. Please contact us for more information on protecting a specific boat.

AD56

AD56
£16.75 Buy Now

M10B

M10B
£9.75 Buy Now

MD56

MD56
£18.90 Buy Now

4MM

4MM
£3.00 Buy Now

Tags: aluminum, magnesium, anodes, volvo, penta, outdrive, aq, md56, ad56, 4mm, bonding cable, hull anodes, m10b

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