I have a John deere gx75 and it will start right up but when I start to drive it it will still run till I get about 20 feet or less and it will die?

Does it sound like its under a load , or running out of gas?

Yes sir it sounds like its under a load

Check your air filter make sure its clean.
Might try changing the spark plug also.

Okay I'll try that an see thanks

HI Josh, you should also drop the bowl on the bottom of the carb to ensure it's clean. Good luck