Hi, I have an older (prob early 80's) 10HP 4-stroke Honda outboard. The motor started to get water in the oil, and after replacing all the gaskets and seals, I thought I had solved the problem. I used it for about a dozen times, and then let a friend borrow it (which I will not ever do again) He proceeded to smash the thing into a submerged rock at full speed. After some inspection, I discovered that the timing had jumped a couple of teeth, but there was no actual damage. I took it all apart, check all the valves, none of them were bent, they all looked perfect. I put it all back together with all new gaskets and seals, and after a couple times out, I check the oil and it had leaked water again. So I have a couple of problems that I am hoping I can get some help with. First of all I am wondering if any of you guys have ever had any problems using RTV adhesive. I used it to hold the o-rings and some of the gaskets in place while putting things together, is it possible that the RTV is causing the leaking? Possible heating up and losing adhesion from the metal allowing water to leak into the oil. Second, if that isn't the problem, is there anyway to pinpoint the water leak other than just taking it all apart? I would like to get an idea of where to look before I just start tear things off. Can I plug up the water system and compress it with air to possible hear where the leak is? I was told that there are a couple problem areas with this motor, i.e. the plastic piece that holds the dipstick, where water also runs through can crack. And something about a place in the head that water and oil are only separated by a rubber o-ring. But are there any other areas that someone knows of? I will also say that after its abrupt meeting with the rock it doesn't seem to be as powerful. Now I know that part of it is prob a slight bend in the prop. There is one little bend at the end of one of the blades, but I don't think it is big enough to cause in the amount of power lose I am experiencing, I have had a bent prop before with this motor, and it was a much larger bend, and it didn't cause the same amount of power loss. Thank you in advance for you help, this has been a frustrating issue for me.