Aux loading is a possible issue, there are some constant flow switches that can sometimes cause issues. I’ve found the wiring harness issues to usually be the main cause of problems on these small but mighty machines. Take the belly pans off and look near the resolver block (safety solenoid block, lock out block). If this machine is used, look for slap-dash repairs and bypasses for the safety circuit. The operator seat safety is a common place to see a scotch lock. Work safe, Todd