If you need any help with honda etc GX engines give me a pm, to say I've worked on a few is an understatement. On a gx390 you have a plastic spacer with a gasket either side that the high tension lead slots into. Then there's the carb, then anither spacer plate before the airfilter . As already stated a Chinese carb is so cheap they are not worth repairing. A pity this didn't happen in early December as I sent around 2 Tonne of engines to scrap and you could of had what you wanted.