As I am new to this I haven't done anything yet. I just got them Friday. I am mechanical and have a shop so can do things as needed. I take it by changing the gray fuel lines that the rubber in them deteriate over time and if they are black they have been changed. are the filters for the carbs internal or external. I looked at a parts list and it looked like they are inside, do you have to remove the carb to do it? I will try the reserve
Thanks for any help.