2003 mercury 75 hp 4 stroke sneezing or hiccup

mjswitzer

Recruit
Joined
Jul 31, 2017
Messages
4
need help! new to forum so may not be posting right, I have a 2003 mercury 75 hp 4 stroke that is sneezing or hiccup when accelerating,runs great at idle i have cleaned and synced carbs,checked compression, new spark plugs, got good fuel pressure, all 4 spark plugs are getting dry carbond up, sprayed carb cleaner around and cant fined any leeks
 

mjswitzer

Recruit
Joined
Jul 31, 2017
Messages
4
also per manual i turned air and fuel jet two and a half turns out , I tried adjusting them out to run more rich too,i can adjust them out to the point of running ruff and also can run them in to the point of running ruff
 
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