Engine Lawn Mower Blades Will Not Engage

I've got a Snapper 52" Zero-Turn Mower, 26 HP, Twin Stick, RZT 285Z Series, and I use it all the time to mow about 10ish acres.

I believe the PTO Clutch is going (going, goooone). Recently, whenever I hit the switch to engage the blades it started hesitating. Then it would flat out not engage for a few minutes, especially after it ran for a little while. Today, when i hit the switch it didn't engage (as per usual by now) and took a very long time to catch and start turnign the blades. A few minutes later, there was an enormous cloud of blue smoke that smelled like burning paint following me.

I assume that the PTO Clutch is officially toast, yes?

If so, i obviously need to replace it.

This is the website I usually order parts from.
http://ift.tt/2seZIft

Are these the right parts?
http://ift.tt/2sePHyR

Thanks in advance!

Engine Lawn Mower Blades Will Not Engage