The above advice is pretty generic. The issue with repairing the cord problem is not quite as simple in a real world scenario. Good luck sliding that impeller off the shaft without breaking it. There's really no need for the set screw, considering how binded those impellers are to those little giant water wizard shafts! Without removing the impeller, how are ya gonna separate the housings? These Little Giants like to have cord issues where it leaves the housing...especially if they've been carried by the cord. It's a hard fix, without breaking the impeller. If none of the wires have severed, then the best solution, unless your impeller happens to not be binded like most will be, is to use 2 different diameters of heat shrink tubing (probably 1/2"

Yes, If it goes together it will come apart. If it is the one I'm thinking of if you take the base apart there will be through bolts that run through the whole pump, remove these I want to think there are some that are short and these hold the base to the motor but they may be behind the impeller. Be warey as I'm not sure. But once the through bolts are out you should be able to carefully remove the top. Some have very frail gaskets here so be gentel. Once you have the top free there will be a compression nut holding the cord before pulling cord through use a light sand paper to clean the cord so the part you pull through will be fresh enough to seal. Don't lube the cord this will keep it from sealing. Pull it hrough and make your repair and put it back together the way it came apart. Use a sharpie to mark the top and housing as you take it apart. When finished loop some cord through pump handel and tie it off so this takes the weight in the future to keep from having the same problem again. good luck