When to change oil on FH680V-ES28-S

I just had a new engine put in my Exmark Lazer Z HP. The Model number is FH680V-ES28-S. I can't find an owner's manual or service manual for this engine anywhere online.

What is the recommended time for the first oil change and then each oil change after that? What oil filter needs to be used? Any certain oil?

Thanks in advance for all help.