Ok. I have a 87 merc 135. I think the stator is bad because the battery is not being charged. (am i correct). I am having to charge the battery every other outing. Also does this have anything to do with the Tach not working. It works sometimes, shows rpm's for a second and then doesn't. But it doesn't work more times than it works. Hope this make since. Much help or advise is greatly needed.