Murray MT100 deck belt replaced and stopped working

[LuckiBird]

More information on the type of mower: 42 in. 13.5 HP 500cc E1350 Series
Part replaced: Deck Spindle Belt for MURRAY 2109600037A / 42" Deck Belt

Hi all,
We replaced our deck belt on our mower and now it doesn’t run. Battery charged and tested. Lights come on but won’t start. Not sure what else to do get it running again.

 

[ILENGINE]

Make sure the deck is not engaged. Will prevent cranking.