Briggs 12hp leaks gas from breather tube, throttle body piece, and every where else except bowl. Float seems to be functioning, I pulled every thing off and blew in the fuel inlet, then again with bowl up, and it was closed. rubber Breather elbow tube has a small crack in it, could this be causing it? Its a briggs 12hp vertical engine. Any ideas anyone

 

Remove the float and shake it near your ear. Do you hear gas sloshing in it? If so, it is bad, replace it.

 

If the float is floating & the needle valve is going up& gas is leaking then the needle or seat is bad.

 

Yes
I took the float off and it was sloshing fuel
So I replaced it.
Problem solved.

 

Very good... Glad we could help!