RE: How to clean varnish off a glow engine?
There IS A Product At You Mercury Marine dealer Called Power Tune.I Have Used It to Clean Vernish From Outboard Carbs For Many Years. Put Parts In Plactic Cantainer,Spray Foam And Let Turn To Luqid Then Keep Filling Till Covered.Let Stand For 24 Hours .Rince With Water Or Carb Cleaner And Blow Dry.
It Will Be Clean And You Don't Waste A Crock Pot. .