I have a Forney with the same engine. I did not have a problem when I put in the one-piece venturi, but I have been told my several engine specialists that they have had no end of trouble with them. I talked to one at a trade show and he said he had to install several new carbs in recently overhauled engines because he couldnt get the venturi to work right. Apparently the new carbs, or factory rebuilt, are "flow balanced", which is something the local shops can't do. It has something to do with the manufacturing of the new venturis. If you look at them they are much thicker at the top than the old two piece. The mechanics I talked to said the problem is that the new ones are not manufactured the same as the old ones and they can change the flow of air in the carb. That might be a place for you to start. I seems to be the only thing you haven't checked.
Good Luck. Steve Finkelman Forney F1 CFIWR ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com
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