'87 30hp Evinrude plug fouling

[bos22]

I have a 30hp Evinrude that is fouling the plug in the #2 cylinder and the fouling is molten aluminum that is from the piston. My experience is that a lean condition is the cause, but I am confounded by its presence in only one cylinder. I was advised to first check the plugs to assure they were the proper heat range and then to be certain the timing was set correctly. The timing is set to 30 degrees under load at full advance. Any ideas?

 

[ob]

Re: '87 30hp Evinrude plug fouling

What sparkplugs are you using?Lean condition on #2 carb is very possible.It will have to be removed and dismantled to be sure.If this engine has been running fine previous to this symptom I doubt if ignition timing is an issue.

 

[bos22]

Re: '87 30hp Evinrude plug fouling

This model 30hp has only one carb.

 

[ob]

Re: '87 30hp Evinrude plug fouling

Well,You got me on that one.Has this engine always fouled #2 plug since you've had it?And ,what plugs are you using??