Hi all, see additional anodes on AK1 V6 engines as well as all BF250s. First pic shows two anodes in the water jacket accessible only by removing the power head. Honda recommends these be changed every 600 hrs or 6 years, I did a couple of motors at 5 years and there was nothing left of them, so go figure. Second pic shows anode in the side of the block , accessible once the exhaust manifolds are off, there are three of these each side of the block. If you look at the "cylinder block" schematic for AK1 V6 engines on boats.net, items 4,5&6 you will find all the relevant part numbers. I believe Honda have done this to try and fix the issues around internal corrosion behind the fuel pump and other areas.