todd goble
Member
Hello I have a merc 350 I got it out for the first time and it ran rough only 3700 rpm's started to pop out of the intake, idles fine starts fine. Rebuilt carb, new rotor and cap, new plugs, marina checked it out great compression said it was bad gas put a cleaner in and said it would be good. Its the same, i can only think it is the timing, which I don't how that would change over the winter or it is the fuel pump. please help I need it