I just finished rebuilding a 86 244 EZGO Marathon engine for my brother. Someone before me had doubled the cable from the solonid to the + battery post, and I failed to notice it when I reconnected the battery. Engine ran great cranked good and had proper speed. The unnoticed unconnected cable finally found a ground and shorted the battery. It held the short for about 2 min before I could get the seat off and see where the smoke was coming from. I corrected the short ( reconnected the cable ) and now it cranks fine runs smoothly but very slow, only at about 1/4 speed. This is the first time I have had anything like this happen. Any ideas ????