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Old 02-01-2014, 11:40 PM
  #874  
Flight Risk
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Originally Posted by jadec241 View Post
Everyone is talking about the ignition on the CRRC 40cc gasser. Anyone know what would cause it to run eratic( it pulsates @ mid to high range). The ignition is a rcexcel 6/7.4 volt setup using the hall sensor from CRRC. Checked timming (28Deg). Tried new carb, checked for leaks, new plug, using a 5 cell 2000 mah nicad battery. We are stumped. Even emailed Milton @ rcexcel. Was thinking it might be the ign. box but am getting good spark.
A couple ideas: A good starting point for carb is low needle, 1-1/3, hi needle, 1-3/4, as jedijody said in post 377 and that seems to be the best setting I can come up with. Also, I needed to solder a tube to the ambient pressure diaphragm cover on the carb, and run tubing behind the engine, as the prop blast was creating problems. Also, you might think of tossing the CRRC hall sensor.