I was preping the boat today . Late in the season last year I got a freebie 9hp SeaKing . It will fire up with no problem . But "boggs out" at full throttle . The carb is clean , the gas is new , the plugs are new . It seems if I play with the choke ,, then it will give full power . Do you have any suggestions for better runing performance ? I'm carberator illeterate , is there somthing I should be trying ? Thanks for any info .