are you saying your machine is a "Husqvarna CZ4817"... ?
if so -
Detailed Specifications:
Engine: 17 HP Kawasaki V-twin engine with electric start.
Cutting Width: 48 inches.
Transmission: Dual Hydro-gear BDP10A pumps and Parker-Ross TE14 wheel motors.
Tires: 13-inch front tires, 23-inch rear...
ehhhh, you service guys are just mad cause she's trying to get her money's worth out of those blades. Oh ya, was there any oil in this mower, or had it all been used as well . . . . .