[TJMack]

ADDENDUM: Polishing the float arm fixed the sticking needle valve problem but there remained a very slight drip from the throat of the carburetor when it sat overnight. Placing a new paper towel on the splash pan under the carb showed it quite nicely. I could tell the float level was good by my home-made float level gauge so it was really bugging me. I figured it had to be something else letting a minute amount of gas into the throat of the carb.

Sure enough. When I took the carb apart again to check the main and cap jets I found that the main jet was just a little bit loose. I tightened it up this morning and so far no dripping. We'll see how it looks in the morning.