Join Date: Sep 2006
Location: Southern Minnesota
Are you sure you got the pilot jet clean? The same goes for the fuel screw. Also, where is the fuel screw set? Your problem lies with one of those things, I'm pretty sure.
The pilot jet is easy to miss. I'm not familiar with that carb, but sometimes they are hidden up in the housing. Also, it's a tiny hole, and hard to verify if it's open. This is normally the first thing to plug when a carb gets yucky from sitting.
The fuel screw is an adjustment that directly supplies fuel for the engine to idle on. Turned further in restricts fuel and makes it leaner. Turned further out adds fuel and makes it richer. Generally these will need to be somewhere between 2-3 turns out as a base line. (It has to come through the pilot jet first). I've seen some people tighten this up instead of setting them. Again, not being familiar with this carb, if it has a fuel screw, it would be between the bowl and the intake side of the carb, usually sticking straight down in front of the bowl.
Now days, it's often for the passage leading to this screw adjuster to be plugged. (Thank the EPA for that) To be serviced or adjusted, the plug has to be pulled out. A drill bit and a wood screw will get the job done. If the fuel screw gets dirty, it will need to be removed, cleaned, and re-adjusted. Starting at 2-3 turns out will get you idling. I like setting them to the fastest idle speed with the engine running.
The only way it wouldn't have a fuel screw adjustment would be if it has an air screw. These are usually sticking out the side of the carb near the idle speed adjuster. These also have a specific setting. They meter air to the idle circuit.