Anyone else having this problem?? I have a 2011 Mercury 115hp Pro XS and have replaced the trim sender switch now 3 times. I get about 6 months out of a sender before it gets water into the unit and fails. I've tried packing the sender with rubber grease around the outside the seal to help stop water getting in but it only slows the process a little. It appears that the seal simply allows water in to the resistor coil and thats it' game over. I mainly run slatwater which should have no bearing at all on the failure but this things are readily for sale on most websites, Ebay, Amazon, Gumtree etc so I'm guessing they sell fairly regularly. At $60 a hit, I'm starting to get jack of this.