Hi All H33 Owners. I have three items to share with you. 1. Yanmar replaced the Heat Exchanger on my 3YM30 today so hopeful the overheating problem now solved. 2. Whilst doing this work the mechanic discovered that the one of the hoses to the heat exchanger was nearly worn through due to rubbing against the bracket which holds the fuel pump. This is a long unsupported hose and the installation is badly designed.I have shortened and re-routed the hose below the one with the Tee junction. As the engine has only done 70 hours I suggest you check yours. 3.At recent haul out I measured the vertical distance from the depth transducer to the bottom of the keel (deep keel) it was 1.33m. So if you want to accurately calibrate the offset this is it ! Happy Sailing 33ers.