i have 86 rude thats blubbering and rich at idle ive owned this motor since new.this is what ive done so far new gas tank & lines ect. new vro pump & pick up assy.(warning horn prob)rebuilt all 4 carbs.& enricher sol valve. I am a experienced harley mech. but this two stroker is driving me nuts. this motor has aprox.1500 hrs on it mostly trolling.ive de carbed it every season.the problem is worse when the prop is in the water (more back pressure causing a richer mixture ?) will massive de carbing clean the exhaust ports or removing the power head the only way? am i on the right track? i wont be able to try all the suggs. right away its still a little cold up here thank in advance ken