Why does the mower drive belt slip or fail to drive on my Simplicity 5101604?
- BBryan SanfordSep 5, 2025
If the mower drive belt on your Simplicity Lawn Mower slips or fails to drive, it could be due to a broken or improperly attached idler pulley spring, so repair or replace as needed. Alternatively, the mower drive belt might be broken, so replace it.









