The brown stuff is called varnish, that's what happens when gas is left in the carbs for years. There are some great products on the market to clean carbs, some come in a one gallon can and you just drop the unit in to soak after removing the jets and screws.
Lots of places online sell rebuild kits for under $20 after you identify what carb you have. I have had great service from http://www.jackssmallengines.com/ for stuff like this.
No advice on the stripped screw without seeing it, got a picture?
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Lots of places online sell rebuild kits for under $20 after you identify what carb you have. I have had great service from http://www.jackssmallengines.com/ for stuff like this.
No advice on the stripped screw without seeing it, got a picture?
Sent from my iPad2 using Tapatalk