1991 Merc 50hp is stalling at low (trolling or idling) rpms. I think the fuel/oil mixture is too rich... seems to be burning a lot of oil. Motor used mostly for trolling, and used to do well at 1.5 mph, but now have to go 3mph to avoid stalling. Anyone have any advice; know how to adjust mix ??? Or does it sound like an idle adjustment issue? :facepalm: