JOHN DEERE S120 Wont Crank
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
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91%
CONF
|
12V 300CCA Lead Acid Battery
The battery has likely suffered internal plate sulfation or chemical depletion, meaning it maintains enough voltage to actuate the solenoid but lacks the amperage (Cold Cranking Amps) required to overcome the engine's static friction and compression. This results in the solenoid engaging (the click) followed by a total voltage drop.
|
VIEW ON AMAZON
#CommissionsEarned
|
|
5%
CONF
|
Starter Solenoid
The internal copper contact plate within the solenoid may be pitted or charred from repetitive high-amperage arcing. When the solenoid clicks, the plate physically moves but fails to create a low-resistance electrical bridge to the starter motor, preventing current flow.
SKU: AUC10907
|
VIEW ON AMAZON
#CommissionsEarned
|
|
4%
CONF
|
Starter Motor Assembly
Internal wear of the carbon brushes or a seized drive bendix can prevent the motor from spinning even when power is supplied. If the solenoid is functional, the starter motor represents a mechanical 'dead spot' or high-friction stall point in the system.
|
VIEW ON AMAZON
#CommissionsEarned
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DIY Repair Guide
Watch exactly how to replace the 12V 300CCA Lead Acid Battery.
// 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.