1982 Mercury 18hp surges

PatBlake

Seaman Apprentice
Joined
Apr 22, 2012
Messages
37
I recently bought an 18hp Merc. Starts fine, runs fine, but with the throttle wide open it surges. From a stop I get to 19-20mph, then it goes between 16-18mph. Any thoughts? I have new gas in the tank. It's on a 14' Princecraft Fisherman aluminum.
Thanks!
 
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