Small Engines (Lawn Mowers, etc.): Riding mower, electric clutch, crankshaft

Question
I have a craftsman riding mower, model 917.272030. I need to replace the electric clutch which engages the belt that turns the blades. The clutch is attached to a shaft that protrudes vertically into the engine. I cannot remove the old clutch from this shaft which does seem to easily slide up and down. I am afraid to pull the shaft out of the engine. Do you have any suggestions as to how I can remove the old clutch?  thanks

Answer
Hello Tom:

Have you Removed the 4 Bolts from the Engine Block that Hold the Base of the PTO Clutch to the Engine? Use Plenty of Spray Lubrication (PB Rust Catalyst) and Spray the Crankshaft Between the PTO and the Engine Block. Hope this Helps. I am Here if You Require More Assistance. Let me Know What Happens, Please. Thanks.

Good Luck

Respectfully

John