I purchased a new carb for B&S 875EX series complete with gaskets and o-ring. When I removed the old carb, there was no gasket on the engine side. Only the one on the air filter side. There is the red o-ring, and a bracket holding a spring connected to the choke control, then the carburetor. Does the new gasket go somewhere between the carburetor, bracket, engine? Thank you. Larry B