MOTOR WILL RUNS AT IDLE SPEED AND STARTS GREAT. GIVING IT MEDIUM TO FULL THROTTLE IT JUST STUDDERS. I HAVE REPLACED PLUGS, AND HAVE CLEANED THE CARB WITH SEA FOAM. <br /><br />Little history, I just acquired this boat, the prop was a 10 3/8 x 13 pitch and it was repitched to an 11, however...