How to Fix a Slow Starting Electric Motor

I have this circular saw that has become increasingly slow to start. Recently I have to give it a push to start at all. It is equipped with a 230V AC 2200W motor.

A new saw is about $300, so I decided to read about electric motors. It appeared, that the start capacitor might be the problem, so I ordered one on ebay for $9 https://www.ebay.com/itm/192057335875?var=4940910...

Replacing it, is really simple.

You can read more about how single-phase motors start here: https://voltage-disturbance.com/power-engineering...

Symptom: The motor does not spin until I give it a push. It takes up to 20 sec. to reach full speed.

I purchased:

1 pcs. AC capacitor. In my case 30 µF 450 V

2 pcs. cable joints

and used these tools:

Flathead and Philips screwdrivers,

Long nosed pliers.

Always disconnect mains before working on electrical machinery!

The capacitor is in a small box attached to the motor. Unscrew it, and gently pull it from the motor. Take care not to rip the wires.

Open the box, and pull out the damaged capacitor. It is often obvious, that it is broken. If there is any fluid leaking, you should wear gloves.

WARNING: The capacitor may still hold some current. You should discharge it by shortcutting its wires, to prevent electric shock. Otherwise make sure, that you never touch both wires at the same time.

Disconnect the capacitor and connect the new one.

The order of the wires are not important.
I prefer screw terminals over pressed nipples.

Carefully put the capacitor and wires in the box, and screw it on the motor.

Connect power cable and test.

You can see the entire process in the video.