SuperDave
Well this is my first post, just joined yesterday.
I changed my stator in my 6hp merc last fall, and runs great now. You will need a small puller. I used a auto steering wheel puller, I think about $10.00 at an auto place. You will have to come up with a odd size socket to loosed the nut holding the flywheel down.You will also have to rig up the correct bolts and washers to fit the puller to the two holes in the top of the flywheel. and rig a way to hold the flywheel while you tighten the puller, doesn't take much. I had lost my spark and needed to test the assemblys to find the problem. I have a chilton merc manuel which shows the correct readings on a multimeter. My stator didn't test bad until I wiggled the wiring. I did take a few pictures with my digital camera of the wiring hook ups and routing before disassembling, and was glad I did. You could probably just mark the leads with pcs of duct tape.
I would guess an hour take out and put back the stator. If I can help you further in any way let me know.
Good Luck
Odtimr