I have an Eclipse reel mower with a Briggs model 5s engine that I like to use and take to shows. Now, at some point I would like to restore this little thing, but the carb keeps me from doing that and here is why. It runs great when it runs, but if I let it sit longer than 2 weeks I have to take the carb off and spray carb cleaner into the end of the the pickup tube and free up the little ball in there. I'll be honest, I've been doing this for 2 years now with the thing and I am getting tired of it. I treat all my gas with ethanol stabilizer and marvel mystery oil. is there something I can do to really clean up that pickup tube? Maybe soak it in something? Is it possible to put in a new pickup tube? I know the tube is sealed in there with a kind of putty and I haven't tried to remove it. Should I get a new carb? Any advice would be appreciated!