Your setup is all wrong. That strut depth seems way too deep. My 4S Cheetah runs the bottom of the strut 3/8" above the sponson bottoms. The CG is 9.8" ahead of the transom but that depends on the prop and speed. No wonder your ESC overheated, the boat was too tight and the prop loaded too much.
Denatured alcohol works well to remove the smell. Don't be stingy with it!
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