Originally Posted By: Linctex
Carbon in the exhaust ports was a major problem back when many 2-cycle engines were mixed with plain mineral oil.(sae 30)
All 2-stroke oil now-a-days is "ashless"... so carbon is pretty much a worry from the past
tcw3 is ashless oil for liquid cooled 2 cycle outboards and air cooled lawn boys
jaso FB,FC,FD oil is low ash two cycle oil intended for chainsaws, string trimmers, leaf blowers and PWC engines
so all oil is not ashless.