My 4.3 L sat for 16 months due to my health issues. It was winterized but not started in that time. (also I live in the San Joaquin Valley, CA, and freezing is rare) When I started it about a month ago it ran fine. I changed the oil, (no water) oil filter, points and plugs. When I started it to check for oil leaks, it purred like a kitten but when I check the oil, the level was higher then before and contained water. The kids and grandkids talked me into delaying the funeral. My investigation reveiled water in the #3 cylinder, but a compression test showed that cylinder as being the highest. (check showed 180 psi as the highest, 155 lowest) I ran the water jacket test, which I found in this forum, and I could not hear any hissing. It seemed like it was holding pressure as well. I do not want to tear into unless there is some hope of bringing it back to life. I have never done major work on an inboard motor so this is why I'm asking if this could be something other then a cracked head, block, or blown gasket. I'm willing to spend some time and money but not if it's a lost cause. I appreciate any help. I've had this boat a long time and it has never let me down before.