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Ive done my force mercury and found it easy to work on only 1 carb on 75hp motor lol. These yamaha carbs look expensive and want to look them over maybe try and clean them out with fuel injection throttle body cleaner or MAF cleaner. They should be kind to plastics. What do you suggest for a newbie doing this cleaning for first time. Have a feeling there in good shape so im not getting carb parts cleaner in bucket. How do I disconnect each one from ****erfly arms. Where is jet located behind the adjusting screw. How many turns out should I end up fishing around 5500 altitude, specs 1 1/2 my guess is 1 1/4. The bottom screw lines up different than 2 above like alot different.