Small Engines (Lawn Mowers, etc.): Toro GTS2 Mower, spark plug, carburetor

Question
Hi,
My mower lost power completely and doesn't run for more than few seconds unless I open the choke up manually. When I open the choke it sounds like it's struggling to run. It was running perfectly fine and just slowed down out of nowhere in the middle of mowing. I cleaned the air filter so far. Please help, what's the next step?
Thank you.

Answer
I suspect you're going to need to rebuild or replace the carburetor.  You can try just replacing the spark plug and pulling the bowl off the carb and cleaning things.  Personally I'd give a quick cleaning to the carb and if that didn't fix things, I'd replace it.  Thanks, PK.