I took my carb off of my Troy-Bilt 2550 PSI 2.3 GPM 675190CC 6.75HP pressure washer and i just realize that theres not a gasket between the manifold (or the engine) and the carb. Im not sure if it is metal to metal and crew it together or get a gasket because some carbs come with the gaskets which might be newer ones or something. Also i did not see a gasket fall off when i took the carb of.