ECHO SRM-225 Wont Spin
| CONF | DIAGNOSIS | PART MATCH | ACTION |
|---|---|---|---|
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86%
CONF
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Flexible Drive Shaft
The flexible drive shaft is a braided steel cable that transmits torque from the clutch drum to the gear head. It is the most common failure point as it can snap under high-load impacts or fatigue over time due to lack of lubrication. When it shears, the engine will rev normally but no rotational force reaches the trimmer head.
SKU: C022000020
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CHECK PRICE |
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8%
CONF
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Clutch Assembly
This model uses a centrifugal clutch that expands to grip the drum as engine RPM increases. If the friction material is completely worn away or the tension springs have snapped, the clutch will fail to engage the drum. This results in the engine running without transferring any power into the drive tube.
SKU: A056000180
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CHECK PRICE |
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6%
CONF
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Gear Case Assembly
The gear case at the end of the shaft contains bevel gears that change the direction of rotation. If these gears are stripped or if the internal bearings seize due to lack of grease, the head will not rotate even if the drive shaft is spinning. This is a common failure mode if the trimmer head frequently hits immovable objects.
SKU: P021045990
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CHECK PRICE |
DIY Repair Guide
Watch exactly how to replace the Flexible Drive Shaft.