I had an issue last weekend with my 2002 2900 SCR 6.2. Launched the boat and within 5 minutes, the temp was at around 175 degrees. Had the same issue last spring and it slowly returned to normal operating temp so just figured there was air in the system so I let it idle probably a little too long this time. It did not cool down so I shut her down and let it cool for a while. There was water dripping into the bilge at the rear, I think in the area of the exhaust Y and I could hear water gurgling internally. When I tried to restart, the engine was hydro locked. I removed the plugs and water came out of #5 only. Took the boat to a local marina and they checked for cracked block or any other catastrophic damage and they assured me that there is none however, they are backed up with work and will not be able to go any further until after Memorial day. I would like to get the boat back in my hands and start digging into it myself. My first step is to remove and replace the impeller and from there, does anyone have other thoughts/suggestions? Any advice would be greatly appreciated!