Early 90s Qualcast 35s. Given it a good clean and stripped and cleaned the carb. New fuel line and filter. Head off and cleaned because the gasket was blown.
Now after a few minutes running I'm getting air back up the fuel line from the carb. I thought vapour lock but there's an awful lot of air coming back and the engine keeps stalling.. Could it just be a poorly seated fuel line letting air in, it looks OK.
There's an idle screw on top of the carb but I'm not 100% certain whether I need it slightly in or out. Any thoughts?