Hi new here, I have a 18hp mercury that I'm having surging at wot and running a bit rough. Had mechanic do full service carbys ect but still same problem. Checked and replaced all the usual plugs hoses, leads, coils.
Can someone tell me what this air jet is actually for?
I think the main fuel jet is supposed to be .052 or 1.3ml but is actually .0571 or 1.45 ml could this be the problem??? And somthing to do with that air jet on the left because when I put a smaller air jet in that one circled it ran better but still surged a little at WOT. The first pic is that jet which was 3ml and I went to 2ml.
Can someone tell me what this air jet is actually for?
I think the main fuel jet is supposed to be .052 or 1.3ml but is actually .0571 or 1.45 ml could this be the problem??? And somthing to do with that air jet on the left because when I put a smaller air jet in that one circled it ran better but still surged a little at WOT. The first pic is that jet which was 3ml and I went to 2ml.
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