No spark

Hello All,

Recently my 912uls has flooded out twice, so bad it wont re start. Even after removing the plugs and airing out the cyclanders. The 1st time it flooded out, it restarted about 20-30 min later after letting the cyclanders air out and the battery recharged. After that it was running again. Pu the plane away come back about 4 or 5 days laters try to start and again flooded out. Took the plugs out let it dry out, emptied the carb bowls incase of any water. Tried to restart and nothing. Cranking speed looks fine. Just won't start. I've been calling my local rotax mechanic for help on this issue also but I'm having trouble getting him out to mu field. With his help I was able to determine that there is, in fact very very low (maybe 1 flash for every 20 or 30 prop rotations) to no spark. This was determined using a timing light on all eight plugs. I come out today to work on what I can and the engine kind of ran. It was running like it was out of sync for a few mins. When it did die it would not restart. Any and all suggestions are greatly appreciated and thanks in advanced. Also about 3 months ago I made a post about a cranking issue that was resolved until this new thing that is happening. At that time all connections were involved in getting the engine running was replaced with new and or larger gauge wires, switches, and connection points were soldered in. Hoping it's not one or both of the CDI boxs.