🚨 Husqvarna 150BT Backpack Blower Engine bogs down and raw gas drops out of the muffler seam
Top Culprit: Ruptured or flooded fuel pump diaphragm inside carburetor
Why It Happens: Ethanol damage hardens the thin internal fuel diaphragms, forcing them to pump excessive fuel straight down the cylinder throat.
🛠️ The 60-Second Diagnostic Test
- Remove the air filter plastic housing cover and verify if fuel is pooling heavily around the carburetor throat barrel.
- Pull the starter rope with the ignition switch off; check if raw wet fuel drops out from the muffler exit ports.
💡 The Quick Fix Steps
- Remove the 4 base screws on the carburetor bottom plate to access and peel away the stiffened, warped cloth diaphragm.
- Layer in a fresh flexible gasket and metering diaphragm assembly from a rebuild kit, then retighten the plate.