Wolf SV4 Scooter Mower - Engine removal?

Does anyone know how to remove the engine on this model? I need to replace it, but it's not obvious how to go about removing it. The blade drive shaft appears to be of variable length (IE the deck goes up and down, but the engine does not), which implies sort sort of sliding spline arrangement. If I remove the deck, will it dis-engage from the clutch assy, and allow access to the clutch (so I can remove it), and the engine mounting bolts?

Phil Saunders
June 2012