Hey I wanted 2 clean my friends carb but it was so frigen dirty and rusty that I cant even take off the screws. I alredy striped one. And that was after I put a bunch of wd-40. And yes I did wait for it 2 kick in. Im wondering wtf I can do 2 get them off... Cuz his engin is not evne running cuz its so gumed up. (been sitting in the shed for more then 6 months and he did not empty it) dumb crap ah? lol Well ty