I have a mcculloch 610 chainsaw. there seems to be a problem with the carb. when I took it apart there was some gummie stuff on the little alumium jet cover thats next to the needle valve float. I cleaned with carb cleaner. also tried spraying cleaner in all the jets. for some reason it does not want to prime when you use the choke. no fuel at all is going thru the fuel line when I try to start. the line and fuel filter are new. will soaking the carb in carb cleaner clean it out. is there a better kind of cleaner I should use for a gummed carb. any advise would sure help.