I've bought a New Idea EGT150 in September. This one I wanted to restore. It may not have the true golf cart batteries but deep cycle 12v works great!
I had the tractor moving in 2 days. The dash wires were mouse chewed and a motor thermal circuit breaker was open. I popped the breaker open to find the screw head that holds the thermal disc contacts was broken off. The screw was 10-32 size so I replaced it but didn't crank it down. Hopefully theres a little protection there. Also found a soleniod thats was not close correctly. I took this apart also to find the coil wires corrode off. Resoldering them and adjusting the contacts made it work again. The 3 mower motors needed both new bearings. I had to go to the CaseIH shop to have the blade hubes pulled. $85/per hour for 1 hour. It was worth it. The blades need to replaced as 2 of them are originals and very well rounded at the ends. I've on order the parts that will make also 100 % complete. Not to many people know about the GE/NI Electric Tractors in South Dakota but I had seen the ads in Popular Science back in the 70's and I've always wanted one.