I changed the lower unit oil a few months ago and I never really noticed this until recently, it looks like "hard water spots" or calcium. I can wipe it off and after a couple more trips it's there again. I don't have any fluid leaking, like it would if the prop shaft seal was out( been there more than once) . 2003 225 Opti.
My question is, does anyone know what this could be or if there is any reason to be concerned?
Modified by Hook'em 203 at 10:49 AM 7/2/2009
Never seen one quite like that..... you sure there's not a crack at the top of that stain?
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To the best of my knowledge there is not a crack, if there is one I can't find it or feel it. It is possible but if fluid can get out then fluid can get in and I have not had any water in the lower unit since I had the prop shaft seal replaced, there was water in the lower unit because of the prop shaft seal but I have changed the oil since having that seal replaced and no water. I have no idea what is causing this, just wondering if I should be concerned.
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