Just some additional information on the strut bolt replacement I completed this weekend:
* The strut bolts are 5/16", Oval head machine screws. IIRC, the length is 2.5"
* The parts department recommended nyloc nuts.
* There are two screws, Buy extras if you're doing this replacement in the water.
* A Tee handled screw driver works well to provide additional torque on the outside.
* I am 5'10 and could hold the screw driver while my mouth was just above water, but wake was a problem. I had to go under to place the screwdriver.
* A snorkel and diving mask will help.
* A bit of caulk was also useful.
My 13 year old daughter could easily work the inside of the bolts with a 9/16" deep socket. However, starting the nuts was a bit difficult. As the nut was tightened, eventually, there was sufficient resistance so that the head did not need to be held from the outside. She tightened the nuts just beyond this point and I finished torquing them down.
It was challenging for me to get my XL-sized body into the locker to access the bolts. Once in, I could only get my right hand into the working area.