I got the engine used along with the plane, and it apears to have a non-stock needle valve on it. Not sure if its the "fix" that os put out or another needle entirely.
Also, with the perry pump, should I have the vent hooked up to the muffler? (I know stupid question) When I got it, the muffler had no nipple on it. I found it strange, and put my own on it. could this be forcing to much fuel into the engine?