A free service manual and instruction manual is on this website for the Hitachi CS 33ET chainsaw. CARBURETOR ASS’Y WT-940 (including 179-192, 230, 231 for USA, Europe) More information can be found HERE (https://chainsaw-workshop-manual.com/product/hitachi-cs-33et-workshop-manual/).
I believe the admins of this website are quite active and quick to respond to these questions pages. requests are fairly fast.
Hi free carburetor PDF manual can be found HERE (https://chainsaw-workshop-manual.com/product/walbro-wt-carburetor-manual/) for the Hitachi cs33et chainsaw with Walbro WT940 carburetor. Ebay and Amazon for any rebuild kits, depending what country you are in and if prepared to import international carbs then there are a few companies that sell rebuild kits and new carbs online.
Walbro troubleshooting guide HERE on this website.
Use this website request form at top of page and I’m sure the admins will put up a parts list, workshop manual or carb specific rebuild/service article (maybe) if available for you, they have done before for me with a husky manual.