That's a fantastic pic of Robert McCulloch and the two extremes of his saws (5-49 and Mini-Mac 6). I'd love to read that magazine. You'd never get it back though...
I've never worked on or with an original Mini-Mac 6. I
have worked on a 110. Simply aweful. They handle and perform well when they're running right. If you have to get to the carb, fuel lines, and tank, then that's another story.....
As Mark said......there's a felt filter pressed into the tank on your saw. On my 110 (which is many years newer, and more cheaply built), the felt filter was a permenant part of the plastic tank assembly........and was gummed solid with the most wicked fuel varnish I'd ever seen, as was the crappy mostly-plastic zama carb. I was unable to un-varnish either assembly without destroying them. Now the saw (99% new, including the P/C and B/C.............but with no carb or tank as I threw them away and replacements are more than the cost of a new saw) sits disassembled in a box somewhere in deep within my cluttered garage...