Tractor Repair: 1941 Ford 9n, ford 9n, sediment bowl

Question
I HAVE A 1941 9n, my problem is I have to pull the choke out for it to run. When the choke isn't out it acts like it's starving for gas and dies. Has a new carburetor that's 1 year old, new gas line, sediment bowl, points and plugs.I have blown gas line out, cleaned carburetor and drained gas tank. I have been working on this tractor 9 years, I am not an expert but do know a little about it. Hope you can give me some advise.

Answer
Hello,

  It's definitely running too lean.  Remove the gas line from the sediment bowl and turn on the valve.  See if you get full flow from the valve.  You need a full stream, not just a little trickle.  Even though you drained the tank, there could still be a piece of dirt or something partly restricting the flow through the valve.  If it's not full flow, remove the valve and blow it out.  Sometimes they even have to be taken apart to clean them out.  If the fuel flow is good, then either your new carburetor has dirt stuck in a jet, or the float setting is too low, or there is a vacuum leak allowing the engine to run too lean even though there is enough fuel.  Check the carburetor and manifold mounting bolts for tightness.  You can spray a little carb cleaner or gas around the gaskets with the engine running poorly and if the engine starts to run better, you found your vacuum leak.  Do this only on a cold engine for safety!!

                Good luck,

                       Arnie