Starts then dies stihl fs45/weedeater

fuel filter --air filter --bad fuel--carb /cleaning /rebuild /replace-fuel line - binding clutch--tension to tight on chain

most times it is easier to do just that

TRY THIS LINK.

over fueling

Fuel starvation either too the carb or in the carb itself, start with a simple cheap fix, replace the fuel filter in the tank on the end of the fuel hose.

The Stihl FS45 has a particular way of getting started as do all the stihl products. We sell Stihl equipment in our store and service and repair them also. The normal starting procedure is to:
Be sure the switch is turned to the ON position which is the negitive sign (-). The (O) is the off position.
Press the primer bulb 3 times.
Move the choke lever to on.
Pull the starter cord three times only. If the engine fires, turn the choke to the off position and pull till it starts.
If the engine did not try to start during the first three pulls with the choke on, you must turn the choke off and pull till it starts.
Remember:Pulling more than three times with the choke switch on will flood the carburator on every stihl product thats on the market.
However, if the units still refuses to start, being its new and still under warrenty, return it to the repair shop that services Stihl products and they will repair it according to warrenty. All parts and labor should be honored at no cost to you. Please provide your receipt and serial number located on a silver tag located on the unit or the mechanic will get it off the unit when he works on it. Either way, it will most likely have to have a new carburator put on it. I hope this helps. Please comment back if this was helpful. Thanks; George

replace fuel filter in the tank and will be fine it is gummed up .stock part at any sthil dealer

This sounds like a timing problem.
It is too far retarded, and needs advancing a couple of thou.
There you go:)

you need to reset the carb. a and b screws