What should I do if the motor won't start?
Release the trigger switch, unplug the saw, and check the blade for any obstructions. If issues persist, refer to the Troubleshooting Guide provided in the manual. Fuses may blow or circuit breakers trip due to overload, incorrect voltage, or dull saw blades. (Page 2)
From the official Craftsman 137.212290 Miter Saw manual, page 2
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