Repairs problems XT 3000 Generac red engine

Have a Dixie XT 3000 with a red Generac 30 horse engine Last year at the end of the season I replaced battery and put on a rebuilt Dixie starter. Everything worked fine until left starter bolt stripped the aluminum block. Put in a new bolt with a metal collar everything worked ok for a week. Now the battery (new) is run down as nothing seem to be charging it.

After the battery is charged it seem to turn the engine over and fuel is getting to the spark plugs, but the engine just wont fire.