Start winding trouble

[BrassMonkey]

Recently acquired an almost new Marathon 4 in 1, one HP, 110/220 motor. All windings including the start winding show continuity. The problem seems to be that the centifical switch does not always reset. The contacts remain open. The motor will run if the shaft is manually spun. As the motor is spinning down, you can hear the switch click when it decides to reset itself. No click no start. The problem is intermitent. The disk and weights that operate the switch move freely. The contacts are clean. I have had it dissassembled several times and can find nothing out of the ordinary. It is a drip proof motor so a visual inspection is limited.

 

[SteveKW]

Between the spool and the bracket holding the centrifugal switch on the shaft there may be some fiber or plastic washers to stop the spool from going too far down the shaft when the motor is running. Add a washer or two under the spool so the spool cannot travel so far making it so that the springs have an easier job resetting the spool. Also check that the spool is properly closing the start switch. Addition of small washers between the end bell and terminal board at the screws can lift the switch so it closes the gap between the spool.

PS
Pray the "Forum Police" don't delete your post.

 

[jbartos]

Suggestions:
1. Contact tech support
2. Follow the motor design basis for its installation, e.g. vertical position, horizontal position, ambient temperature, etc.
3. Disassemble the motor and check the switch if you do not have any warranty.