When you have finished running the engine, do you always run the carb dry of fuel? If not, you are constantly gumming up the jets, and it's a cumulative effect.
Another good habit is Stabil or similar in the fuel.
A third good habit is NEVER to use fuel that is more than one month old. Dispose of it in your car's gas tank.
Following these 3 habits, or not, can make all the difference, between a nightmare engine and a dependable one.
I use stabilizer, and was actually wondering whether running the carb dry is a good idea. Is it? What about moisture?
I would like to do something different, as I really appreciate a working motor when I need it.