Have a Honda HR215-HE, MZAM-6244755. Mid 90s model. I don't see the "-HE" model anywhere on the net. It has a hydrostatic transmission and I'm trying to bleed the air. There is a post on this forum that gives the bleeding procedure for this range of MZAM #. But it refers to "HX" models. Is the "X" meant to be just a place holder, such that "-HE" is also included for this bleeding procedure?