Sx75 engine remove

Check this link out Amber. john deere sx75 parts diagram Google Search

I have not been able to pin down your exact model but this link is to another model that may give you the info you need. john deere 214 steering wheel removal

me id check the drive belts !!! id bet there worn and slipping , if the inside of them shine like glass yep that's it !!

call john deere

that would be the next place to go

with the belt loose, and motor off check for free motion of your actual blades. Sounds like one of them may have bound up. Could be a bad bearing, or that something wedged under the deck. Otherwise, I'd recheck the drive belt to make sure it is routed properly and not binding anywhere at all. Also make sure that all the idle pulleys spin freely.

Most likely clutch/brake pedal switch.

I haven't been able to get mine out, but I can get to it. There is a shield held on by two fly nuts. It is right behind the seat and on the opposite side of the mower than the lever that engages the blade.

After the shield is removed, there is a black wire running to the top of the spark plug you should be able to pull it off.

Then you'll need a spark plug socket and an extension. I think it may be a 13/16 size socket that you will need. Turn gently back and forth till you get it out.

Try this.
When the machine begins to stall, immediately loosen the gas cap.
If this works, drill out the vent holes on the cap.
Please post back to let me know if this works.
Gary

bad clutch