CRAFTSMAN V20 CORDLESS STRING TRIMMER (CMCST900) Wont Feed
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
95%
CONF
|
AFS Replacement Spool (Pre-Wound)
The Automatic Feed System (AFS) relies on the centrifugal force of the spinning head to pull line through an indexing mechanism. Failure to feed is most frequently caused by 'line welding,' where thermal energy from friction fuses the nylon line to itself on the spool, or by 'line crossover' where improper winding creates a mechanical bind. A factory-wound spool ensures the line is layered with precise tension and zero overlaps, allowing the centrifugal actuator to release the line as intended.
|
|
|
5%
CONF
|
Spool Cap and Spring Kit
The spool cap acts as the housing for the indexing mechanism and maintains the vertical alignment of the spool against the motor's drive shaft. If the internal spring is fatigued or the plastic indexing teeth inside the cap are worn down by debris/friction, the spool will not rotate independently of the head to advance the line. Replacing the cap and spring restores the mechanical resistance necessary for the automatic feed cycle to trigger.
SKU: CMZST120SC
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DIY Repair Guide
Watch exactly how to replace the AFS Replacement Spool (Pre-Wound).
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.