This is a new carburetor for the Satoh S550G and S650G and the International 284 tractor. We have modified it to fit in place of your old carburetor but YOU WILL HAVE TO MODIFY YOUR OWN MANIFOLD. (DIY do it yourself). This will require you to drill and tap the mounting holes, install threads inserts and then new studs for mounting the new carburetor. We will furnish the thread insert kit in addition to a new fuel filter, fuel line, vacuum line, mounting studs and choke cable.