Hello, my mercury 135 is having some problems, sure would appreciate some advice. I started to fog the cylinders and noticed top right plug was loose, not removable by hand but I could easily wiggle it around while in the cylinder. It would not tighten up. I have noticed it has been using allot more fuel, maybe I have two problems. Would like to do a compression check but if it will not tighten down in that cylinder dunno what to do. It was not missing best I can remember but obviously something is wrong. Maybe the loose plug is causing more fuel consumption. Any ideas? Thanks sorry, 1999 135.
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