ZT-720 Bogging down when engaging the PTO

[wiredhot]

When I was trying to mow earlier the engine would bog down and acted like it wasn't getting enough fuel or too much fuel. I tore down the carburetor on went through it with a fine-tooth comb, nothing there. So I went through the fuel pump and verified it was pumping the proper amount of fuel. I have pulled the fuel tank, drained and cleaned it out, verified that all the fuel lines were open, and replaced the fuel filter. It has been put back together and it is still bogging down when any load, driving or blades, is put on. I have a few videos of it. One of me on the mower, the other I had my son sit on it and actuate the PTO switch.

https://youtube.com/shorts/43hKeujJvdo?feature=share

Is there anything else I might want/need to check?

 

[Scrubcadet10]

being a twin cylinder, i suspect it's only running on one cylinder.
i would start by Checking for spark with an inline spark tester, Or with the engine running remove a spark plug wire, if the engine dies completely, the other cylinder is the problem, if there is no change, put the wire back on and pull the wire off of the other cylinder.

 

[ILENGINE]

Engine sound OK to me. Sounds like a bad or seized bearing on the deck. Picking up a grinding noise when deck is engaged.