🚨 Echo PB-580T Blower Throttle trigger moves completely but engine refuses to rev up
Top Culprit: Slipped or snapped internal metal throttle cable core
Why It Happens: The inner braided steel cable slips out of its plastic anchor slider on the carburetor linkage arm or breaks inside the tube.
🛠️ The 60-Second Diagnostic Test
- Watch the gold throttle linkage lever on top of the carburetor while another person squeezes the handle trigger grip.
- If the handle trigger moves easily but the carburetor linkage arm remains completely still, the cable has failed.
💡 The Quick Fix Steps
- Unsnap the plastic control handle housing and unhook the broken z-bend metal tip of the cable core wire.
- Feed the new throttle cable assembly down the guide conduit, anchor it to the carburetor bracket arm, and test full range sweep.