On my Starcraft with 25hp I do not use a transom saver. The skeg is higher than the axle, so what really is the purpose. The only time I had a problem was backing the trailer up a steep, grassy hill. The skeg hit and pushed the boat and bow stop. That was a mess, so I am very careful backing up.
On my Sylvan with a 150hp I'm sure it needs a transom saver, as the previous owner used one when I bought the boat. On my first launch, first experience with the boat and a transom saver, I snapped the thing like a twig. I loaded the boat and strapped it down and installed the transom saver, then noticed the boat was not winched up enough. Took the straps off to float the boat again but forgot the transom saver. Winched it to the bow stop and when I drove up the ramp it snapped. I replaced it with this thing that you could probably jack a house up with:
https://www.amazon.com/gp/product/B00TTLV99W/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1