I'd go back to the original needle even though the spring one should work.
It may be it changes how you should adjust the float. A low float could
cause this. There is nothing else to do for the power valve. Did a new
power valve come with the kit? If it did then I'd try the old one just to
see if that changes anything. Also does the carb have a small filter at the
inlet? If so check that as well for being in in the correct direction.

"JamesE" wrote in message
ups.com...
I must have checked the float level 10 times before I put it back
together. Of course I could be measuring it wrong however. On my
rebuild kit it had a note that said that with four cylinder engines
experiencing rough idle and flooding that it may be necessary to
change to a spring loaded needle. So I changed it from the original
solid needle to the spring needle and then readjusted the float
level. Could this be causing the problem? Also you mentioned that I
could have put in the power valve wrong. What could have gone wrong
with it? I just put the gasket on and screwed it in. Was there
something else I should have done? Thanks, James.