hi everyone, hoping to have my problem solved here, i have a 35hp johnson/evinrude, early/mids 80s, it's white and grey and orange, don't know the exact year, anyways, starts fine, idles fine, runs okay, but when i go to full open throttle, it starts to gag and sputter a bit, it never cuts outs, but i know i'm not getting full open throttle from it, i've checked the spark plugs, the gas mix, the fuel pump, any other guesses? things to do, look for? thanks