Originally Posted by
stephen_bess
That's the oil you used as after run (not a good idea), plus carbon deposits. If you want something cheap for after run that doesn't gum up, use Marvel Mystery Oil. That head button is concerning, the debris and junk should all be removed with 0000 steel wool, then a throight flushing with motor spray or fresh fuel on a clean shop rag.
the issue is not the ARO, the issue was the heat, the engine needs to cool first.
3n1 is used by so many people as ARO including myself, zero issues - then again i personally really care for my engines as i dont buy every engine on the market like some
