Reply To: TN27 5 hp leaking carburetor

[frankr]

Not 100% sure, but I think your float valve is leaking a tiny bit. Can we assume the cork float is ok? I long ago quit trying to seal them with dope. To each his own, I guess. I use a Mercury nitrophyl float. But if that is not the problem, and you cleaned the float pin and seat and it still drips, you might have to take more drastic action. I agree with the link, and do not believe in the valve grinding method, although I have done it with success (sometimes). My do-or-die method is to “coin” the seat. With the carb assembled, remove the plug directly below the float pin and push the float pin against it’s seat with a punch. Now, tap the punch LIGHTLY with a small hammer. I gotta tell you though, this is an art. If it still leaks try again, a bit harder. Of course, there is a point of destruction,, so proceed at your own risk. I used to work in a plant that manufactured hydraulic valves and we coined 1000’s of seats most every day.