Question

I have a mercruiser I/O 4.3 190 hp on a SeaRay 185 Sport. I had a Stingray hydrofoil stabilizer mounted on the transon and it worked great for planing the boat when it is loaded and especially for getting the skiers out of the water sooner. Since then, I SeaRay service mounted a swim platform on the back and on one occasion I raised the transon, the fin hit the ladder and broke the mounting plate on the transon. I had it welded and want to put a hydrofoil back on. I now know not to raise the transon too high so the fin doesn't hit the ladder. But, I also now know there is a trim limit switch on either side of the transon and I think I need to adjust the trim on the port side so the transon does not raise too high when I take it out of the water. Please tell me how to adjust the trim on the port side so it will not raise the transon too high when I put the hydrofoil back on and are there any special tools needed. It looks like only a phillip screwdriver is needed.