I have a John Deere 1620 8' mower. It mows short dry grass great but as soon as you hit tall, thick, or slightly wet grass, the deck begins to slow down and eventually stall. The engine speed doesn't change at all. It's a completely hydraulic driven deck. I have a John Deere 1600T 11' mower that I believe to be very similar that can mow anything and not miss a beat. Any ideas on what can be done? Speed the blades up? Use a different kind of blade? Thanks!
