Troy Bilt 42" Blades Engaged

[DappleDoxieStaff]

I have a 2006 Super Bronco.
I burned up the belt (mowing over rose bush trimmings) and played a merry chase getting a replacement.
It came from Lowe's, not MTD - but correct dimensions
Girl Mechanic got the belt on, deck mounted, ready to mow. RIght? WRONG
At the lowest deck position, the blades are still. Raise it up (PTO in OFF) and the blades spin
Belt is routed correctly ... and I am chasing an actual MTD belt, but it is a maddening search.
What am I looking to fix now???
Thanks !!!

 

[tomplum]

Let's start with a proper model number from below the seat. You wouldn't believe how many decks these things have. 04060 belt, 04045 were common belts on these. Decal under the hood just may have the proper belt number. . .