There is no way that the fan is supposed to push. I was a HONDA tech for 25 years, never saw such a setup on any HONDA water cooled unit. I am not saying that yours does not push, just that it should not push air forward. My 2016 pulls air. You are correct, a push fan would absolutely not work and would cause overheating. The 2021 and the 2016 use the same parts (part numbers are identical), so that is definitely not supposed to be a pusher fan. The fan blade (and motor, of course) is supposed to turn clockwise when viewed from the front, if my memory serves me correctly. How about posting a picture of that fan. I'm thinking that the blade is installed backwards. Definately should not be a pusher fan