failure mode
FM-11: FM-11 MOTOR RUNS BUT THE CHAIN DOES NOT MOVE
FM-11 MOTOR RUNS BUT THE CHAIN DOES NOT MOVE
Diagnostic overview
FM-11 MOTOR RUNS BUT THE CHAIN DOES NOT MOVE
Likely Root Causes
- Chain is off the drive sprocket
- Drive links are jammed in the bar groove
- Broken chain or damaged drive links
- Stripped or broken drive sprocket
- Internal gearbox failure
Quick Checks
- POST-REPAIR CHECK
Related symptoms
Motor runs, chain does not
Motor runs, chain does not Inspect chain engagement, sprocket, bar groove, and gearbox through FM-11.
The motor can be heard, but the chain remains stationary or only twitches while the trigger is held.
The motor can be heard, but the chain remains 1. Release the trigger, remove the battery, and do not keep powering a stationary
Included in the full manual
- root cause analysis
- tools needed
- step-by-step repair procedure
- diagrams
- exploded views
- post-repair checks
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