Tom. Two reasons pop into my mind. 1. Induction leak somewhere that makes the mixture lean, which is pronounced in the transitional phase from idle to full throttle. 2. Plugged idle circuit in the carburetor. Which essentially does the same thing. It produces a too lean mixture in the transitioning. Test for it by applying carburetor heat . If the engine smoothes out, the mixture is lean and you can start looking for the source of the trouble. But look at the authoritive source (at least for me) : http://www.sacskyranch.com/eng33.htm Hartmut
To: [EMAIL PROTECTED]: [EMAIL PROTECTED]: Sun, 9 Dec 2007 21:37:26 -0600Subject: [ercoupe-tech] Engine Stumbles I have a C-85-12 (Stromberg carb) installed in my 415-C. The engine 'stumbles' when transitioning through 1500 RPM. Startup, idle, and top end are OK. Any ideas? Tom N99101 _________________________________________________________________ You keep typing, we keep giving. Download Messenger and join the i’m Initiative now. http://im.live.com/messenger/im/home/?source=TAGLM
