This topic has been covered extensively in past forums, but thought it was worth mentioning again here as we all now have time to attend to procrastinated boat projects. I've had Jubilee ten years and she is twenty years old. Eight years ago I had to replace the AC inlet and replaced the entire shorepower cord as well...all due to blackening and some melting on both male and female sides of the connector. Same thing happened this winter, probably when I had a small heater on at the same time as the wet/dry vac (rain water)...and maybe the battery charger etc. I rarely leave the shorepower connected as I use the boat regularly all year. Only have it on if batteries are down or am leaving the reefer on for some reason. Dismantling the connection showed significant corrosion up the hot (black) wire, probably due to salt water intrusion.
I went the Smart Plug route, bought online at Home Depot, getting the White inlet as opposed to the Chromed one. It was super easy, the new inlet fit in the old hole. The screw holes even matched up!! Had to cut pretty far up the black wire to get good copper, but had just enough to get the job done. I looked at the YouTube videos and read the instructions several times (a first for me). As a result, there were no "re-do's" and all is well.
Attached is a pic.
Catalina 36' MkII #1867