G'day all
Yep, always great advise from the pros.

My suggestion - long term - is to replace the carby diaphragm.
You have a pulsa-jet - and diaphragm condition is critical.
They deteriorate with age.

Apart from tube blockage, air leaks, and fuel quality, the diaphragm
is the critical link in fuel starvation. The pulsa-jets had a small
fuel pump to lift fuel from the bigger tanks.

https://www.outdoorking-forum.com.au/forum/u...riggs-stratton-pulsa-jet-diaphragms.html

Hope this helps.
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Jack