Rican this is the old version Macstar 28.I spent hours trying to get this carb dialed with no luck [:@].I''m gonna see if I can swap the carb with one of my backup ofna''s and see how that goes.I can''t get this thing to hold a tune for more than a few passes at best.If I can''t get it to run better than it is now it will become a paper weight aswell[]I''m gonna try the carb later today.