I use acetone, xylene, and atf in equal amounts overnight in the cylinder. It has worked in many semi carboned / varnished 2 cycle equipment with decent results.
I got a nice used husqvarna timmer from the 1990's ( back when 2 stroke oil was $hit) and only the exhaust side of the piston is quite varnished, but the intake side is mint. Nothing will touch it!
I have tried, seafoam, marvel mystery, carb cleaner, red armour oil, and nothing will reduce the varnish clogging the oil grooves on the piston.
Any ideas?
I got a nice used husqvarna timmer from the 1990's ( back when 2 stroke oil was $hit) and only the exhaust side of the piston is quite varnished, but the intake side is mint. Nothing will touch it!
I have tried, seafoam, marvel mystery, carb cleaner, red armour oil, and nothing will reduce the varnish clogging the oil grooves on the piston.
Any ideas?