Bosch Rotak 37 corded electric lawnmower

[blup]

Good afternoon

I am mending this lawnmower for a relative.

When turned on (both switches depressed) the mower starts to power up for a second, then goes dead before reaching any speed. If left for a few minutes the same happens.

Is this a switch problem, the capacitor, or is it likely to be a motor fault.

Any thoughts gratefully received.

Cheers Blup

 

[Burnerman]

There's a good chance it's a switch problem, but an equally good chance is a severed cable, where it enters the switch handle.
Try moving the flex about a bit when trying to switch on, just to see what happens.
John

 

[blup]

Many thanks

Have checked the cable and looked over the switch, both seem fine.

I also removed the plastic housing over the motor and a plume of smoke rises up from the top of the motor shaft, when the switch is applied.

Cheers

Blup

 

[Burnerman]

I'm afraid the insulation is failing on the commutator, if there's some smoke.....there's probably a fair bit of sparking from the brushes too.
It's unlikely the repair will be economic!
John