changing crank seals, first timer 88 Marathon

[Dmontgomery]

Got the engine back in and all hooked back up lastnight, Started it with the drive belt off turned over a few times and fired right up. I ran it for 30-45secs. Went back out this morning put the drive belt on went to test it out and the starter generator is weak tried charging battery didnt help tried a new battery same results. I noticed the A2 wire is getting very hot and smoking. One thing after another after another.......what to do now. The few seconds it ran it sounded very healthy couldnt wait to try it out please help this thing has me at my whits end