Question for all. On my sons 70cc auto red cat when you turn on the fuel shut off which is right on the carb gas runs right through the carb and out two tubes one on top of the carb and the drain on the bottom. any ideas?

 

has it always done this or is this a new atv? if it new then it sounds like a defective petcock/carburetor, it should turn the fuel off before it inners the rest of the carburetor, these carubretors with the built in petcock are reather cheap i've seen them for as low as $20, you can replace it or if the quad runs good the way it is you can add a inline petcock for around $3.00, and just leave the carb petcock open. most small engine repair shops, e-bay or boat dealer parts department have them.

 

its not new two years old and it does not run. gas runs out right on the exaust.

 

the carburetors are so cheap for these engines 50-110cc, i woundn't waste my time and effort taking one apart and trying to fix it, i'd just replace it and at the same time i would install a new spark plug, and do a valve adjustment.

e-bay item 160183374475 carburetor with fuel petcock $21.85