OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Honda Engines Honda GX 160 valve and running problem

This is crazy,motor starts dead easy with the choke but shuts straight down when I turn it off,have been over everything again,valve clearances inlet 006" and exhaust 008",got to be something simple starts too easy,any more ideas,the hose from the OHV cover to the breather/carby assembly,whats its primary function,is it just emmission control?