I do not know what caused your Foreman to stop turning the wheels. However, I can tell you how deep I am willing to put my Foreman in water. I run mine at water levels up to and level with the tops of the fenders. I have had absolutely zero problems. I will not intentionally take it any deeper for fear of drowning it out. The intake and vents are still located in the factory position. I do plan on snorkling it and moving the vents some time in the near future.