Stihl FS70R Tank Pressurizes

[Mek-a-nik]

It’ll run on a spray of mix, but it’s not getting fuel from the tank. Pushing the purge bulb brings no fuel, but pressurizes the tank.
Inside the carb “looks” clean. I did a cursory cleaning with spray cleaner, being easy with the air hose, regarding check valve integrity.
I think it’s a check valve that’s stuck, but I don’t know much about them.

[KE4AVB]

Zama C1M carburetor series.

Sounds like the main nozzle check valve has failed. Due these particular versions being provided only to Stihl to only option is the replace the whole carburetor. Stihl won't even provide carburetor repair kits for most of their carburetors and has barred Zama from selling outside the Stihl network. At one time these nozzles were available but not any more.

Boy I hate it that Stihl brought a controlling interest in Zama. The last carburetor that only needed a repair kit cost over $100 to replace. My Stihl dealer did try ordering the kit but Stihl discontinued it. It is all about the moo la and they don't care about their customers any more.

It seems that a lot companies are going this route of providing poor service after the sale now using Covid-19 as an excuse for sticking it to the customers.