[Don Cape Cod]

I have had what I believe is called a "Grosse" carb fuel valve stick! Stick hard. This is the two ball bearing type. Apparently the new fuel is either etching the surface of the top small ball or is creating some sticky situation.

When I recently got this H & H rebuilt engine running, there was near two gallons of fuel in the oil pan. The fuel pump had not been rebuilt by H & H. It had been done some time ago when the body was being restored. I could not tell how old the rebuild kit was, but it was leaking like a sieve. The new gas is really doing a job. You can see material missing and some of the inner fabric showing.

I would try to locate a valve that is all metal, even a cleaned up original one.
Don