My 12 year old son brought home a MF 7 that he bought for 5 dollars. It needed some work, but we have it running. The battery will not stay charged and after digging into it we have found that the regulator is missing. How can I determine what regulator is needed? Is there an aftermarket option available. I have found a Massey Ferguson part for $200. This is a little more than I want to invest in a $5 tractor. At this time he just wants to use it as a working tractor/mower, not restore to original condition.
With his purchase he also got a MF 8 parts tractor. This one had the regulator on it, but it is in really bad shape. It is a REPCO FG 4720 B (I think it is a B anyway).
Any thoughts would be appreciated.