Partner Colibri Petrol strimmer ?

Hi,I need to change the starter pulley and most probably the starter coil spring and pull string / rope on the above.

1. How do i go about finding the correct and full name,
relevant model number of the above petrol Strimmer.

2. Where can i buy spare parts for the Partner Colibri
Petrol grass Strimmers.

3. Where can i download the correct diagram manual.

Q..... How would you rate the above machine for its performance , value, reliability , and eventually when this machine needs replacing ,which is the machine you would recommend to buy , considering that i will be using it on a semi - professional level - (that is somewhere between domestic and professional level etc). please supply as much information as possible on the above: Partner Colibri Petrol Strimmers.
Thanks.