066 parts diagram

The O66 and O64 are basically the same saw just with a different bar option. All of the parts are interchangeable. If you need parts the serial number is what you will refer to. Also taking your saw with you to the parts store is always recommended.

I’m happy to assist further over the phone at https://www.6ya.com/expert/christopher_722ea729aae6fd07

not enough information
take it to a stihl shop and have it properly identified

go here for manual:
STIHL 066 Chainsaw Owners Manual

You aren't a dealer or technician so you don't get to have one. I can sell you one, [email protected]. You remove the no spam when you type it obviously

http://www.mediafire.com/view/bk5yfldiqwuoiyw

Don't mess with the insides of a STIHL carb, just buy a new one. Why put new parts in an old carb?

You are absolutely right, an 066 is a STIHL model chainsaw. Good job!

The one with the two right angle connectors is the inlet line. The other is the return line

http://www.mediafire.com/view/bk5yfldiqwuoiyw

You don't get to have one, you're not a professionally trained STIHL tech.