There are over a hundred, so no one in here has any idea.
Made me laugh out loud........but true.
As
@MMM indicated, there's probably not anyone who has the experience to answer this question. I would say everyone who has responded all use their own gear. I'll share a couple of things from the spreadsheet that MMM referred to:
Finding a (Best) Dive Op in Cozumel Post #60 has the latest spreadsheet.
* All of the dive ops I researched rent gear
* Deep Blue Cozumel rents both ScubaPro and AquaLung
* Dive House rents ScubaPro
* As
@ReefHound indicated, Dive With Martin has free rental and weight integrated BCDs
* Julio Kin and Jungle Divers rent AquaLung
* Scuba Tony Has weight integrated BCDs
* Scuba With Alison includes a computer
* As
@jbjclj indicated, Tres Pelicanos rents ScubaPro
If my memory is correct, TripAdvisor is more likely to have a review that includes something about the rental gear an op uses (good, bad, new, old) although brands were rarely, if at all, mentioned. A lot of first time and newer divers seem to post on TA.