Rebuilding the carburetor and not sure which way the diaphram and gasket go (forgot). I have the diaphram then the gasket next to the cover. Have the large metal plate on the diaphram towards the carb body. Will start with the primer and will not continue to run unless I open low and high jets several turns and then will run for a minute and then quit. It is a Tecumseh engine. And I installed Tecumseh part #630978/Oregon #49-002. Any ideas, or help?