have brand new swisher/shindaiwa edger(E3000). It starts right up and runs well until I go WOT then it skips and seems to struggle. Another poster on this board advised that C4 engines have an issue with puddling of air/fuel mixture in the crankcase which gets pushed into the head at WOT and causes this issue. Anyone have anything similar happen with 4mix engines and any suggestions on resolving this issue? Thanks.