Hi all, I recently acquired a Gravely 16-G with a hand clutch from a neighbor. After changing out the battery and giving the carburetor a good cleaning I got it running and it seems to run really well. It idles smooth, shifts in and out of gear fine. My question is this, it runs and drives fine however when I engage the blades and attempt to mow the grass (not overgrown in the least) it bogs down and stalls out. Any suggestions would be greatly appreciated.