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so i repowered a few years ago w/ a carbed 150 johnson on my 18 seacraft. had an old mercury 200 racing motor that ran like a scalded dog, but not very often. anyway, went out monday to go catch some breeder reds. ran ten miles, fished for a few hours, and on the way in i started losing power. motor bogged down at about 4000 rpm and would slowly lose power (bucking). i stopped, put it in neutral, let it idle for a few, and started again. got 1/4 mile or so, same deal. repeat, but just barely got her on plane, and went a bit farther before it happened again. this time was accompanied by loud warning beep and "check engine light", which means fuel flow restriction. this happened once before last time i was out (the previous monday), but just once, and i forgot about it. i change plugs and fuel/water separators every six months, but i think it may be time to clean the carbs. is that what this sounds like? would love to tackle it myself, but would love to get some insight first. im no master mechanic, but i can turn a wrench and dont mind getting dirty.

as for gas, i try to run ethanol free, but dont always. use bright blue startron religiously though...