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9.9 mercury outboard that runs like it is idling even at full throttle Plugs gas filters and lines have been changed Suggestions?
Wiki User
∙ 15y ago
first. is the throttle valve moving open? you can see it with a light when the choke is open. it's the round disk near the back of the carb in the hole behind the plastic screen. these engines use a plastic lever on top of the carb to activate the throttle. sometimes they slip on the shaft or break off. check to see if when the throttle is moved that it moves the valve.
Wiki User
∙ 15y ago
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Are there any filters on the throttle body?
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