Your spares man will be very happy with you doing that because he needs the money from that and the next one you will buy
If the stator really is putting out 51V AC that will fry it in no time flat
Being that it is a Walker & the alternator is buried 25 pulleys deep I might hazard a guess that the blower housing has not been pulled off every season and the flywheel not blown out .
Usually they go under voltage but you really need to see why you are getting 51 V AC