Electric Lawn Mower "motor hum run" Questions

...it run too long, starts to smell. Wonder if it's just clogged. Can I remove housing (have to break through it, I think)? Bought it used. Any help, greatly appreciated. Motor brushes are wearing

...hum. When you give a twist , the motor runs. I hope it is the capacitor. If it is so how to dismantle and fix a new one. Be very care full if you know nothing about electrical capacitors. They will ...

...hum and does not run. But if you give a help to turn the motor, it will run even with a load. I assume it is the capacitor. Please let me know how to replace the capacitor. This one was answered ...