Stihl fs86

[brothergrim]

My stihl strimmer fs86, fires and starts fine runs for about 3o secs then dies? I'm thinking carb possibly?? Any help appreciated

Cheers Ben

[GardenKit]

You are thinking right Ben, it sounds like fuel starvation. The carb is the second thing to look at, first is the tank filter and pickup hose. If the hose is intact and the filter clean, move on to the internal gauze fuel filter in the carb.

 

If these simple moves dont cure it you will have to move on to more complicated checks, but take one step at a time. Have fun.

[brothergrim]

I've had the fuel tank off checked the filter and line both fine, air filter off and cleaned carb off and cleaned, still doing it grrr

[Rich2484]

Metering arm height.

 

If the car is not a fault then I would check spark. As soon as it stops take the plug out and check.

 

Does it not start again until cool or does it fire straight back up again??

[brothergrim]

No it doesn't fire straight, have to start it as if its cold, choke couple of pulls fire choke off fires runs then dies as if you've just turned it off?

[Rich2484]

Fuel starvation.

 

There is something not right. Could also be air leaking in past the carb. Is the carb gaskets in tact?

 

With the carb check the diaphragms are all good and no splits or cracks in them by holding up to a bright light.

 

More checks require more tools. Like vac testing etc.