I went to check my boat today (it is on the cradle) and was stunned to see about 12 inches of water and ice inside. There has been a lot of snow and rain this year and I haven't been able to check it for a few weeks. The water level was approx 2 inches above the oil fill cap, so I know water will have entered the case. I think it was just below the alternator. It was half way up the coil. The starter was submerged. I am feeling sick about it. How much damage is likely? Is it easy to flush water from the oilcase? What components are relatively watertight?