🚨 Stihl FS 56 RC Engine bogs down completely when pulling throttle trigger
Top Culprit: Carbon-clogged spark arrestor screen
Why It Happens: Exhaust carbon can block the spark arrestor screen and prevent the engine from expelling exhaust efficiently at higher RPM.
🛠️ The 60-Second Diagnostic Test
- Let the engine cool completely and remove the spark arrestor screen from the muffler.
- Hold the screen toward a light source and check whether carbon buildup is blocking the mesh.
💡 The Quick Fix Steps
- Clean the screen thoroughly or replace it if the mesh is damaged or heavily plugged.
- Reinstall the screen and verify the engine accelerates normally under throttle.