I have a 1983 150 Merc. V6.Worked great 2 years ago, didn't use last year. Took it out this year and could'nt get above 2000rpm under load. Tore down carb's, they were very clean but flushed all passages anyway. Also changed spark plugs. Now I get up to 2700-3000 rpm and high speed miss. Timing...
