Sound goes crazy on new Army 400E

Any idea what’s going on here? If I start up and start running right away, no issue. If it sits idling after start up, after abut two minutes the sound goes crazy. This has been since it came out of the box. Don’t know if it’s related, but smoke is erratic. From mediocre to poor. To add insult, it’s already broken a traction tire, that’s the easy part. Any suggestion or do I request a RA.

Steve

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7/27/1910:00 PM

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