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Toro Lawn Mower Transmission 121-9178
This part 121-9178 is compatible with:
- Product Type:
- Lawn Mower
- Brands:
- Toro
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Common Problems Fixed by the Transmission
Based on customer reports and repair data, this part commonly fixes these issues:
About the Transmission
The transmission is powered by the drive belt, and the drive belt connects to the engine crankshaft. When the drive belt powers the transmission, the lawn mower wheels turn. To determine if the transmission is defective, observe the transmission while the lawn mower is running. If the transmission pulley is spinning, but the lawn mower wheels don’t turn, this indicates that the transmission is defective. The transmission is not repairable—if the transmission is defective, you must replace it.
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