912ULS operations in desert heat

I am considering the purchase of some  aircraft with 912ULS engine. A flight school who operates many such aircraft at a higher density altitude airport told me that they ground all such aircraft if airport temps exceed 97 degrees.

Anyone give me idea if this normal for these engines or only for a flight school operation where they are doing many landings and run ups per day?

We plan to take off about once every 6 hours per day with our new aircraft.

Another local CFI told me that he shutdown his school between June-Aug.

Comment please.