I have an old 1641 Cub cadet. It has a 20hp briggs repower and a 54" deck. It has very poor cutting performance and plugs up constantly. I have a system of driving up on ramps every half hour of mowing and cleaning it out. I have newer high lift blades on it. It doesn't start to be effective until the late fall when the grass is dry and tough and then it works okay. The chute is also gone. Seems to have enough power to run it. Just terrible performance. I'm debating getting a smaller used 48" deck and hoping that this is just a crappy design. The deck is rusty and in crummy shape anyway. I think that this mower wasn't designed for a 54" too and I may not have enough power potentially. But the repower is more than the 16 it came with.