I have a 1995 or a 1997 Evinrude 40 hp outboard - 2 cyllinder 2 stroke, carbs, electric start.
Used to work fine until a year ago I had to turn the throttle about 1/5 of full travel to keep it at idle, otherwise it would shut off.
Re-built the carbs, needle turned to factory (2.5 rotations out)...