1985 50 hp mercury miss at higher throttle!

Lake Houston

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Joined
Mar 21, 2011
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I have a 1985 50hp Mercury that recently started missing at higher thottle speeds,I have added 5 ounces of Sea foam,new fuel filter,new plugs.The carbs were rebuilt 2 years ago.The engine has always ran great,and it starts right away and is quick to get up on plane.???I'm just curious if anyone has experienced this?
 
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