Hi, i am new to this forum, have been following it for ages and have now joined as a member.

I have a Scott Bonnar 45 that starts up fine but after a few minutes of mowing, its seems to start running rough and stalls until it is not running anymore.
It starts up ok not long after but will do the same again.

I have down the following in terms of maintenance:
- removed carby and replaced gasket between the fuel tank and the carby.
- replaced the diaphragm
- replaced the spark plug
- checked the air filter, it is not brand new but still look relatively clean
- drained and replaced with fresh fuel
- replaced the engine oil
- sprayed carby cleaner into the carby whilst running to try and clean the internals out
- the choke seems to correctly operate

I have tried adjusting the mixture needle to a point where i think i can hear a slight difference with its tune but still stalls moments later when i engage clutch.

This has been puzzling me for a while and keen for any advice?

The below details are on the actual mower frame:
The model Number is: 45058
The Serial Number is: 371092
Its a Briggs and Stratton Engine

The below details are on the actual engine:
Model Number: 80202
Type: 2324 01
Code: 90100303


Thanks