I have a brand new easy start stihl 50 whipper snipper it came already fuelled it kicked over then died and now wont start or kicks and dies any thoughts

Check the float on the carburator sounds like it is stuck

With 2 strokes I always start with 'AIR' 'FUEL' 'SPARK' from the sounds of it the choke might be stuck on (choking the motor ha ha) also check the air filter, You have fuel and its moving through but the fuel filter might be slightly clogged. As its starting and going on low your spark unit is ok but you might need a new spark plug.

Make sure the head is engaged on the drive shaft correctly

Sounds like you have a straight shaft trimmer version that have got bad bearing(s) that needs replacing. It probably will take the whole gearbox as a replacement item.

Has it got a fuel bubble like button you need to push a few times to get the fuel flowing? Or is there a throttle lever near the starter that you move up slightly until the engine warms up then you decrease it?

Sometimes, there is a waxy substance in the fuel tank and fuel lines that is put there by the manufacturer to prevent deterioration during storage. Machines may sit in a store for months / years before getting sold. I would get some fuel cleaner and flush the tank and fuel lines , then put some fresh fuel in the tank. I had to do this with a brand new whipper snipper. Had the same problem.

all Stihl products are 50:1 fuel mixture

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remove the recoil cover and check the dogs that engauge the starter to the flywheel

I have a Sthil and the wiper snipper it starts but when I increase the power it seen to either stall or flood plesae help

I have a Stihl FS 45 and have had problems with it running for a short time then cutting out. The problem is like to be either- the filter attached to end end of the fuel pick hose that goes down into the fuel tank is blocked or- there is a crackor split in the corrugated section of the fuel pick up hose between the fuel tank and the carburettor. If such a crack or split exists it will cause air to be sucked in with the fuel upsetting the fuel/air ratio. A new hose not adjustment is the only cure