Also if battery weak or charging system weak/faulty the clutch will stall out engine, charge battery up with charger and try. Check for binding in the belts, spindles, idle pulley, anything that moves when the belt engages, ensure all turns freely. Find below link for your manual as it may help and link to testing safety switch.
2018 Poulan Pro PP19A42 19HP 42in Mower Tractor Husqvarna 48 in. GTH2548 Riding Mower for Sale Used John Deere X500 Ride on Mower for Sale Cub Cadet XT2 46″ Riding Lawn Mower for Sale Snapper Pro 48 in. Zero Turn Commercial Mower Used Troy-Bilt Bronco 42-in Riding Lawn Mower 2003 John Deere x585 riding mower 4 wheel drive