I am no electrical expert, but I think with just a portion of the skeg in the water, the motor is mostly in danger of having a dirty skeg. Now that skeg is an electrical connection to the water but I am really not sure how much corrosion can occur on the rest of the motor not submerged. From my own observations of motors doing the same skeg dip, it looks like the rest of the transom is not suffering any ill effects. The added electrical activity could accelerate corrosion on that motor or elsewhere connected to it where you have high corrosion potential such as a stainless screw in aluminum. I would check the skeg and motor mount at least for pitting after the first month and go from there. There are skeg protector products out there that may help but there may also be a paint or coating you could dip the skeg in for a barrier.
What do other people think on this? Makes me curious as well.
What do other people think on this? Makes me curious as well.