I have had this issue with a 2016 h60ft with 2.5 kubota ,the issue was the wiring harness going to the EPR had rubbed and had bare wires causing overfueling, and it would randomly backfire and blow apart the inner air filter, repaired the wiring harness and that fixed the issue, Also replaced the engine isolators since that was the cause of the wiring harness failure ,wich seems to be common with 4 cyl kubotas since they vibrate so much , the engine mounts should be replaced sooner then say a 4.3v6