[jetson22]

I have a 23 yo 185 that is slipping or wont move at all when going up a small incline. The motor runs well but wheels wont turn. I am thinking it is the hydro unit. Is this worth a fix (belt or something else simple) or move on to another mower? I have been looking at ZTRs, man $$$$.

 

[Austen]

I would check the fluid level and also the condition and tension of the drive belt like you mentioned for starters and go from there.

Also confirm the hydrostatic relief lever on the back isn't enaged.

If the fluid looks fine and drive belt condition/tension are ok, it sounds like it's something internal.