Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Pull the valve cover(s) and check the Valve clearance and also the Push Rods. Double check the routing of belt and make sure blades are fully mounted to spindles also
You can try to ByPass the seat safety switch just to rule it out also, as that is the main safety switch that kills the engine when blades engqaged
Next to the spark plugs, you have Valve covers ( normally will say OHV on them) They will need to be pulled off and inside these are 2 rods. They get bent at times. Also the valve clearance has to be at the proper settings. If you are unsure, I would take to a mechanic, as the valve clearance is a critical thing and can cause a lot of damage if ran at improper settings.
I wouldn't, but if belt was loose, it didn't have the pressure that it does now.
This may not be the cause at all. It is the most common reason engine stall when blades are engaged.
Double check the belt routing and check to make sure belt is not jammed upon a pulley. What is the product and serial number of your mower and I will pull diagrams so I can view it aso
Which model ZT is this?
Hope you can get it fixed and back to running properly again. Sorry i was unable to assist you further. Please RATE me for the services I was able to provide. Thank you and Have a good day