This sale is for a rebuilt original Marvel Schebler TSX 765 carburetor. It has been completely taken apart and Ultrasonic cleaned and bead blasted inside and out. Correct bits run through passages and blown out. New throttle shaft, choke shaft, float, float valve, float pin, load adjustment as well as gaskets and screws installed. And all machine work done as needed. It has been tested for leakage and flow and comes with mounting gasket. It has a 2-3/8" mounting bolt pattern and a 1" bore. It is adjusted to correct settings to start your tractor, fine tuning will be needed. This is the the correct carburetor to 500, 600 & 700 series, ie 501, 541, 601, 641, NAA, 2000 etc. tractors with 134 cubic inch engines. Please see pictures. We describe our items as accurately as possible. We do not know everything, so look at the photos as well as reading description completely. I will ship internationally and will combine shipping on multiple purchases.