If you have a lift, make sure it will hold the weight of the boat, 2000 lbs dry weight, and please use the large slings that are 6 inch wide for protection of the boat and water ballast. IN ADDITION, MAKE DARN SURE THOSE STRAPS ARE TIED TOGETHER ON EACH SIDE TO PREVENT SLIPPAGE OF THE STRAPS FROM THE BOATS. Keep kids from beneath boat.
Before raising, tie a messenger line to the centerboard line which is 7/16 line, not 1/2 or you will be sorry at which time I will make you walk the plank. Ha
Raise the boat up until centerboard (CB for future reference) is fully extended down and with clearance to remove as well.. There are two plastic covers at the base of the compression post which need to be removed exposing a large bolt. Remove these covers and have the correct tools for removal before lifting. Remove bolt advising person below it is removed all the way. Most of the time the cb in the cb bracket will not come down but you will have to remove it by swinging the cb sideways which will loosen the bracket and in some cases pull down as well. The term I use is to wiggle that cb down so the bracket will come loose. When off, take a mental note how line is threaded thru the bracket.
Remove the messenger line from the old line and attach new line of course 7/16 inch line to the messenger line and pull back thru to the deck and secure it. When ordering new line, get 4 feet longer than required per specs. Then thread the new line back in place. You will note two large stainless steel pins that need to be secured in place. Simply put a piece of duck tape over the hole to temporarily hold them in place as when the bracket is back up, they will never come out. Also, put a dab of silicon around the bolt hole on top of the cb bracket. This is one time never use 5200 in that application. Align the bracket back in and push in and you may have to wiggle it in. Never force it.
When the bracket is in place, put bolt back on. Two things here to remember. Put a little grease on the threads of the bolt and hole in bracket where bolt is threaded into. Never force the bolt on or you will be cross threading and that sir will be an expensive replacement. Simply start the bolt by hand only and when it is threading correctly use tools. You can put some silicon underneath the head of the bolt to seal but once complete, add a little 5200 around the bolt head to insure no water leakage inside the boat. Why 5200, it will adhere to the stainless steel better than all others permantently and just a little will be fine.
Raise the cb up and down for a few times to make sure it is working and then raise it up all the way and place it back down on the trailer. If you feel this is too much, get a yard to perform this work. If you feel something is going to give, remember to get out of the way as your life and that of others cannot be replace. I had to chew out an owner a time or two when they were unsafe.
Ok, if you still need any help, contact me thru this forum. I am the godfather of this boat as a dealer but now retired.