Engine wont crank

[Blake1998]

Need help please Gravely zero turn will not crank was running great has bagger system went to change out bags and when done it would not crank back up at all. Tried jumping it off battery charger wont even attempt to turn over.

 

[Blake1998]

the model number is 991083 if someone could help it would be much appreciated PLEASE!!!!:confused2::confused2::confused2::confused2::confused2::confused2::confused2::confused2::confused2::confused2::confused2::confused2::confused2::confused2::confused2::confused2::confused2: