Guess I'm going to have to do just that...I had a tough time getting it to start this morning..but got it going ..Why don't you try your spare S/G? It does not take too long to swap it out. Then you will have a better idea of what to do.
Then today, while mulching all the leaves that decided to drop off all at once (thanks to 2" of rain with 40+mph winds last night),--near the end of the run,about a half hour,I noticed the red dash lamp was on,indicating no charge...
I finished the job and put it in the garage,and when I tried starting it again,all I got was a "clunk" out of the S/G..
The S/G was very hot too..I let it cool off about an hour,and then it would crank again,slow,but I only got it to run for a short time--I forgot I had shut the gas off..
I took off the belt gaurd and took off the belt,then tried "starting" it--the S/G does spin but sounds labored,spinning the pulley by hand it doesn't seem that "stiff" though...boosting the battery with a car battery didn't improve the cranking speed any,so I think its about done inside..at the least it will likely need a good cleaning inside and the bushings lubed up..if its not cooked maybe I'll put new brushes in it if any can be found locally..if it needs them..
I attempted to take the S/G off,but had to give up for the day,it was getting dark and I was not feeling good,and was in no mood to deal with it today--had a lot of other discouraging things happen today too, and that was the last straw..
I've got 2 upper molars that need to be yanked and cant get it done for 2 weeks,and the 10 days of antibiotics has made my stomach a mess..on top of being in agony with back pain..so I really needed it to crap out now..
It appears there is a bolt under the side of the dash on the battery tray that has to come off to get the belt shield off that covers the back side of the S/G--that will be a real joy to remove,I may just cut an access hole in the side of the dash with a hole saw to gain easier access to it..dont care if its "mint",I'd rather be able to fix the darn thing easier...looks like the S/G is the hardest thing on the tractor to remove,second only to the transaxle..might be easier to just yank the whole engine out complete ?..
I may just push it aside for now,and if I need to mow again,just swap the deck onto my '67 Suburban 12..getting discouraged having so many things that need work,and I'm not up to doing it myself any more..I also have other things more important to deal with..