#12A-446A711, need help replacing drive belt!!!

[rspice]

I can't get it on, I've checked the belt part number, it's correct... Plz help

There is no tension pulley

 

[Rivets]

Have you routed the belt the correct way around the idler pulley. If it is gear shift it should get tight when you leave off the clutch pedal. If it a hydro unit it should be tight all the time.