Re: old sea horse
what's the model # off the transom mount? if it is actually a 57' 10hp it just may be the set is of motor and boat is near perfect, and the 9.9 is not set up properly. i have a 55 15hp that is great. smooth idle, no coughing , or sneezing . will troll for ever, then runlike a scared cat. used Joe Reeves carb adjustments, and a decarb.