I posted this issue about a month ago, and feel now maybe it's a different problem than I originally thought. I have a cub 1650 and after mowing for while, it wants to bog down and eventually die. Not starting back up til after it sits for awhile. After putting a new condensor on it today (thinking it had to be an electrical issue) it fired up and ran/mowed just fine. It wasn't until I started mowing up the hill, that it again, wanted to bog down and die. When it started to bog down, I disengaged the mower, and it sounded fine, but continued to bog down when engaging it again. Finally it died. So my best guess is its a power issue. It's not even that steep of a hill though. Any thoughts out there??? Thanks a bunch.