I picked up this cheap used MTD mower. I show it has the Chinese made Powermore OHV engine. I have done a ton of work on this to get it to the state it is in. It is more of a learning experience and “hobby”. Anyhow, my only remaining issue is it seems to have a miss. Carburetor and fuel tank were both cleaned thoroughly. My best guess is I have an air leak behind the carb where it mounts to the engine. There is a big gasket/heat shield component between them. I plan to carefully put some black gasket maker caulk behind it to see if I can seal it up. Make sense? Any other ideas? Also, the plastic top housing is broken and I need a new one of those. Anyone have one laying around? I think it is part number 731-05692 / 931-05692. I don’t think running it without that would cause a miss.