Link for testing the stator and regulator:
http://www.onlycubcadets.net/forum/showthread.php?t=368
I rewire completely my 1650 and I still got intermitted power cut to the PTO, I need to change both fuse older, check yours too, you may have a problem there. QL are a real PITA to work under the dash and reach the fuse older! They look like having been design for Chinese small hands