Need diagram of of switch box CSB 08

My qualcast 1000W 96B electric Rotary Mower power handle cuts out when gripped goes for 1 minute then cuts out have to squeeze hard
Thanks

Clubman, May 2020

Thanks I think I have put the spring in the wrong place hence the request for a diorama of the
Switch box
Thanks

clubman, May 2020

If your mower runs for 1 minute and then cuts out, I'd suggest your problem is not the switch and could be the thermal overload protection device. Check your motor and blades are free from obstruction and rotate freely.
If the switch is indeed faulty, simply order a new part as they are cheap and easily available and not worth the time or effort trying to repair.

Rupert, May 2020