1976 mercury 850 full throttle issue

portdog721

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Joined
Aug 13, 2017
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just had the carbs rebuilt and cleaned out and now when i go to start it up the engine will immediately go right to full throttle. there is no play at all, cant change the rpm's using the throttle. this wasn't an issue before the rebuild and i don't think that the shop messed with any of the adjustments so does anybody have any idea whats going on?
 
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