case 210 tractor won't start with new belt on it

[stvbllngsly]

folks, this is the truth... i replaced the worn belt with a 4L310, which is a 31" x 1/2". I was told this is what the old belt was when measured at the mower shop and auto supply shop. i put it on but the engine didn't fire. i trickle charged it and 2 hours later, no fire. i removed the belt, kicked in the clutch, and it fired right up. i put the belt back on and started adjusting. no matter how loose or tight i adjusted it (max both ways), no fire. i put the old belt back on. started no problem. since the old belt stayed on, i tried shifting into gears. all grinding. kept adjusting to the point that it would shift into gear but would only move when i [I]pressed the clutch in[I].
getting kinda frustrated. any suggestions?

[The kid]

Welcome to TractorByNet

[mguitas]

[murphy1244]

Welcome from Ohio. Something is locked up.