Was spraying carb cleaner in it and had the engine stall, when cranking it popped back over the wrong direction and threw a flame out the intake. Had some overspray on the filter and up it went...Melted the injector connectors, some port in the intake box. I pulled the plugs to remove the extinguisher dust and any remaining carb cleaner...thats what you see with the first two cranks is no spark plugs / no compression. Then I get new plugs in (broke one taking them out, time for a tuneup anyway) and tried to start it.