I initially used a jump box at the battery with no result.
When I noticed the spark today, I had booster cables attached to the tractor battery. I had the key turned to ON. When I clamped the ground side of the cable to the engine, there was a very noticeable spark and I could hear the “crackle” The positive side had not yet been touched to the starter.
I’m just not sure why a ground would spark? The battery is still in the system.
But I will double check both ground cables. I have a ground to frame at the battery box and a cable from frame to engine at the front.
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