Honda HRX217VKA models do NOT have a blade clutch, the blade is bolted to a holder plate that mounts direct to the crankshaft (like most mowers made today, starting/running the engine also spins the blades).
The Honda HRX217VYA does have a blade clutch (yellow button/control on the right-side handlebar) The engine is free to start/run while the blades remain still, and will only spin when the operator engages a blade clutch (a.k.a. Roto-Stop).