In Reply to: Starting a rebuilt engine posted by Chris Libby on April 16, 2020 at 22:22:37:
If the rebuild included new paint, you may not have a good ground path from the battery to the starter. ...All connections need to have paint removed where the starter mounts to the engine and where the battery cable attaches to ground, as well as anywhere in between where the current path has been painted.
Are you trying to crank the engine with the sparkplugs in? ...If so, try removing them to see if that will get the engine spinning easier. ...Put some oil in each cylinder if the engine has been sitting a while since rebuild.
Was the new battery tested or put on a charger to make sure it was fully charged?
The tractor should be 6V Positive ground, so the negative terminal powers the starter. ....Your car is 12V Negative ground. ...How are you hooking up the jumper cables?