If you cleaned the air filter, removed cleaned and reinstalled the muffler before verifying all you said; try a teaspoon of fuel directly into the carburetor throat. If it attempts to start you have a fuel delivery problem. Carburetor needs a rebuild or cracked fuel lines are the likely culprits but other anomalies can also cause this. It is on you to determine why fuel does not get into the engine, we cannot. If you are your wits end perhaps it is time to go to Hip Pocket National Bank and pay for your local Stihl mechanic to perform diagnostic tests. Please reply below with your results.
Lou
Check the muffler for plugging of the arrestor screen. If no help, check the carburetor for a hardened diaphragm or any plugging. Are you getting fuel into the primer bulb when pumped several times? Make sure the primer is pulling fuel from the carburetor by removing the line that goes back to the fuel tank and place a small cup or can under the primer port that the hose came off of. Pump the primer several times--it should push fuel out each time. If not, place the carburetor line on the other port and repeat the process. The pump must pull fuel FROM the carburetor to properly prime it. Barring a blown crankshaft seal, the engine should start. Hope this helps!
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If you cleaned the air filter, removed cleaned and reinstalled the muffler before verifying all you said; try a teaspoon of fuel directly into the carburetor throat. If it attempts to start you have a fuel delivery problem. Carburetor needs a rebuild or cracked fuel lines are the likely culprits but other anomalies can also cause this. It is on you to determine why fuel does not get into the engine, we cannot. If you are your wits end perhaps it is time to go to Hip Pocket National Bank and pay for your local Stihl mechanic to perform diagnostic tests. Please reply below with your results.
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