I screwed in the mixture screw and it was 1.5 turns out from fully in. Then I undid the mixture screw and sprayed carb cleaner in, but I cannot see more than one hole in the hole for the screw. Anyway the carb cleaner came out of the intake for the cylinder and out the bottom of the carb.

I cannot check the flatness because I don't have a feeler gauge.

Thank you in advance