Hi I have a 5 horse briggs on my go cart I have replcaed the diaohram it has a full tank of gas and I've adjusted the idles screw to the specs of the repair book I have it will start but won't stay running dew to its not pumping fuel like its supposed to what is my problem

Will it run if the cap to the gas tank is removed?

Hi,
The 5 HP engine used to suck up trah on the lower pickup tube and clog the screen. Alternately, depending on age , trash in the main in that upper reservoir or trash in that jet at the base that used be an adjustment.
Peace,
Clarke