no starting switch in it!
2 sets of windings in parallel with the capacitor in series with the start winding only. Permament Split Capacitor Motor.
Windings can break down, short from loop to loop and not burn up totally. They just never get up to speed.
rewinding a small motor can be done, but it isn't easy , not fun, not cheap to pay someone who knows how!
Guys and gals rewind coils for old radios all the time, but that is easier than a small motor!
Lots of surplus motors out there, google the manufacturer's model number, it could hve been used in other small tool or machine application? You never know!
NOT INDICATED DIAGNOSIS based on original post.
1 - " The only problem is when I first got it I plugged it in to see if it even worked. The motor worked perfect."
2 - "I took my
air hose and blew several chunks of dried up chunks of mud out. all back together and looking fine the electric motor will not work."
3 - "Flip the on switch and it will
hum and with a little help by hand spinning the cutting wheel it will take off and work fine, but only after helping it get spinning by hand."
I'm reading Air hose either destroyed start switch or blew something into start switch causing it to remain open, which accounts for both
HUM and Hand Startable. Small cap start motors were built, Gomco hospital suction machines were famous for them, and most of those went to scrap from start switch failure.
I have a larger Baldor buffer that HUMS when powered but won't self rotate. SP MOMC switch bypassing the start switch solves the problem, and the buffer self starts when the button is held down for a second as the motor is powered.
Once spinning the motor on that grinder has no need of a misphased starting coil to keep it running.
The motor started & ran before the Air Hose. It did NOT start after the Air Hose. Likely failure caused by Air Hose. Chance air hose destroyed a start winding is LOW.
Both coils should be meterable for continuity without disassembling the motor.
The run coil will appear across the line leads. The start coil will likely be meterable from 1 side of the line to one of the Cap leads. The only question is how the motor manufacturer sequenced wiring the start switch.