6CBL1007844 Trying to show what I've learned myself. This is the second one I've worked on personally. The first I did had water in the oil as well. The problem on the first was leaking internal anode seals between the camshafts. I had read about heads cracking so I pulled both heads and took them to be pressure tested. The shop I took them to had no sealing plate or rubber seal that would cover the complete mating surface with the cast-in exhaust manifold. I happen to have a Bridgeport in my shop, so I made a plate and found a perfect piece of rubber for the seal at Graingers. When they tested them they pointed out to me where it was leaking around the bolt-in anodes. I replaced all the seals and reassembled. It has been fine the last 2 years. This current one when pressure testing has a long crack running in the area between the camshaft area anodes on the starboard head. I haven't went through many past posts to see other issues but I have seen references to dealers only replacing powerheads when there is water in the oil. I thought I would bring up what I found working on the 2 I've seen. I am not really an outboard mechanic but have been into many. My background is in in import cars as a shop foreman in an independent shop for 45+ years (mostly retired to my hobby shop now) so this engine is easy for me to understand. Either of these issues might be diagnosed by putting it on a strong flowing water hose (engine off) with the valve covers removed. I currently need a starboard head to repair this one if anyone has suggestions over what I've found on Ebay and the general internet