RCU Forums - View Single Post - webra 160 MC carb with futaba 9c help !
Old 10-23-2007 | 07:08 PM
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HuaChu
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From: rochester hills, MI
Default webra 160 MC carb with futaba 9c help !

Hello ,

I am new to the webra engine and is absolutly a stranger to the MC carb. I have been following the instruction posted by Tony Frackowiak & Jerry Budd over central hobbies website and the help from Rusty, up to today ( after two long weeks trial ), I finally can get it to run at a stable idle speed.
The problem is that I am using Futaba 9c with 5 points curve, and I am having difficulty getting a stable speed at any other 4 points.
I can not tell whether it is too lean or rich whil I am throttling up from 1st to 2nd point. For some setup ( like 8 % of 2nd point), the engine would stay run ~ 20 secs then it stop. That is about the longest time I can get at only 2nd points of the whole curve ( it is getting cold here in michigan and my patience is wearing out). The original straight line set up (0%, 25%, 50%, 75% and 100%) is definitely not working. I can not even get the engine to run over the 2nd point (with 25% setup).
I am not sure should I go much richer like 30, 40 or 50% at the 2nd points.

Any sugegstions and comments are really appreciated !!

If you have experience running this engine with the same setup ( MC carb and Futaba 9c), can you tell me your 5 pints % setup?
I know I may not be able to run this engine with the exact setup as yours , but least it will give me some idea.

Thanks so much !

Mike