The belt that drives the mower blades bit the dust tonight and I replaced it with a spare. It's actually the belt that came with the LA125 when it was purchased. The problem is that there's too much tension on the belt and when the engine is on, the belt is engaged, driving the blades. I've backed off on the belt tensioner as far as I can, and even went as far as removing one of the bolts that hold the tensioner in place so I could move it further.
If the deck is lowered considerably, between 1-2 inches, the belt is relaxed and the blades will not turn...if it's raised above 3, too much tension is on it and the blades engage.
The tensioner pulley is all the way to the right (looking down at the deck) so I don't think it's being pulled by the cable.
What am I missing?