Sorry, I did not notice it was fitted with a Zama, but the suggestion is the same.
I use genuine Walbro on Walbros because my wholesaler is a Walbro distributer
Zama gaskets & diaphragms come from CTS in China who supply the Zama factories in both Japan & China
Ruxing parts come from another supplier in Hong Kong because Ruxing have no distribution network down here.
It is very very confusing for me & I do it every day of the week
Now days I rarely ever pull a carb apart unless the tool has been sitting for years and is gummed up or it is very old and slow to respond because the metering chamber diaphragm is stiff.
I think more damage is done to carbs by people pulling them apart unecessarily than from failing in service.
If you don't have a pressure/vacuum pump & gauge then the easy trick is to slide the carb off, turn it sideways and blow air through it
High volume / low pressure is best.
If you can see it aspirating fuel out the engine end, it is working and at very worst might require an adjustment.
The simple trick is to store it flat in summer when you are using it regularly then when the season finishes tip the fuel out and run the engine dry
I have been doing that with my Stihl tools and they have never been touched for 40 years apart from replacing the tank filter & rotted purge bulbs.
With the highly suspect fuel now days I mix 1 litre ( quart to some ) of fuel as needed even if it is 3 times a week and only do a gallon mix when we are clearing the fence line ( 7 miles )