My stihl whipper snipper loses power and cuts out when i try to rev and apply throttle.

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.

throttle cable, call a Stihl dealer. Part look-ups for Stihl and others are not available online

all Stihl products are 50:1 fuel mixture

If you need further help, I’m available over the phone at https://www.6ya.com/expert/kelly_69a0cf1b13789df1

Check the muffler, spark arrestor (if so equipped. It is a small metal screen that usually screws into the end of the muffler) and exhaust port for carbon build up. You can remove the carbon from the arrestor and muffler by burning it out with a small hand held tourch. If the exhaust isn't blocked then it may be the carb. The least likely would be the coil if the advance part of it has failed but that is pretty rare.

Sounds like exhaust system is stopped up,try without muffler,if no problem then muffler either needs replace or repack,depends on style of muffler.

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