Black goo
I did a bad batch of fuel that resulted in black goo mess on my G62 and crrc40. I know, live and learn. I shoulda dumped it then but I continued to use it when in other planes. Both engines are back in different planes now but the 40 is a real problem since it goes on a ziroli stearman thats painted with WBC. I'm running stihl ultra at 40:1 now which cleaned up my 20cc, but I still have a long way to go to get the other two running clean. I've tried milder cleaners on the painted surface like Simple green but it only gets the light small specks on the paint without doing any damage to the paint job. Is there something I can use that wont damage the WBC paint job?
If I have to I'll run the engines on the test stand until they run clean like the 20. But at this rate, its gonna be a lotta gallons.
Edwin