I am having a problem with my mower ,it will start and run but every once and a while it will start to shut off ,so i bounce it slightly on it's wheels it starts running great again ,The carb has no Bowl or Adjustments ! Can someone please help me fix this as i had cancer ,and just got done fighting to keep my bladder and Kidney and now no more Thank God ,But this Mower is about to stress me out so any help will be great!!Thanks Jim