Mercury/Mariner 150 1998 carb. From what I am reading there are a few screws that affect the idling of the engine. Air/gas screw as well as another. I saw at least two places to adjust the idle yesterday. Can someone please advise which of these screws is the one to adjust? Boat got progressively worse yesterday and ended up idling at 4000 rpm at end of day. Could not hardly get in and out of gear. Any help is appreciated!
Buy a good manual and follow the directions.
17’ Henry O Hornet
w/ Johnson 88spl